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8 GammaDistributionImpl (Commons Math 2.1 API)
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90 <H2>
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91 <FONT SIZE="-1">
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92 org.apache.commons.math.distribution</FONT>
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93 <BR>
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94 Class GammaDistributionImpl</H2>
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95 <PRE>
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96 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
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97 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/commons/math/distribution/AbstractDistribution.html" title="class in org.apache.commons.math.distribution">org.apache.commons.math.distribution.AbstractDistribution</A>
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98 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">org.apache.commons.math.distribution.AbstractContinuousDistribution</A>
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99 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.math.distribution.GammaDistributionImpl</B>
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100 </PRE>
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101 <DL>
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102 <DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A>, <A HREF="../../../../../org/apache/commons/math/distribution/ContinuousDistribution.html" title="interface in org.apache.commons.math.distribution">ContinuousDistribution</A>, <A HREF="../../../../../org/apache/commons/math/distribution/Distribution.html" title="interface in org.apache.commons.math.distribution">Distribution</A>, <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A>, <A HREF="../../../../../org/apache/commons/math/distribution/HasDensity.html" title="interface in org.apache.commons.math.distribution">HasDensity</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</A>></DD>
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103 </DL>
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104 <HR>
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105 <DL>
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106 <DT><PRE>public class <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.30"><B>GammaDistributionImpl</B></A><DT>extends <A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A><DT>implements <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A></DL>
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107 </PRE>
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108
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109 <P>
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110 The default implementation of <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution"><CODE>GammaDistribution</CODE></A>.
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111 <P>
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112
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113 <P>
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114 <DL>
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115 <DT><B>Version:</B></DT>
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116 <DD>$Revision: 925812 $ $Date: 2010-03-21 11:49:31 -0400 (Sun, 21 Mar 2010) $</DD>
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117 <DT><B>See Also:</B><DD><A HREF="../../../../../serialized-form.html#org.apache.commons.math.distribution.GammaDistributionImpl">Serialized Form</A></DL>
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118 <HR>
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119
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120 <P>
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121 <!-- =========== FIELD SUMMARY =========== -->
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122
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123 <A NAME="field_summary"><!-- --></A>
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124 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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125 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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126 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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127 <B>Field Summary</B></FONT></TH>
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128 </TR>
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129 <TR BGCOLOR="white" CLASS="TableRowColor">
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130 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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131 <CODE>static double</CODE></FONT></TD>
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132 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#DEFAULT_INVERSE_ABSOLUTE_ACCURACY">DEFAULT_INVERSE_ABSOLUTE_ACCURACY</A></B></CODE>
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133
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134 <BR>
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135 Default inverse cumulative probability accuracy</TD>
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136 </TR>
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137 </TABLE>
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138
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139 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
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140
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141 <A NAME="constructor_summary"><!-- --></A>
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142 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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143 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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144 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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145 <B>Constructor Summary</B></FONT></TH>
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146 </TR>
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147 <TR BGCOLOR="white" CLASS="TableRowColor">
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148 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#GammaDistributionImpl(double, double)">GammaDistributionImpl</A></B>(double alpha,
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149 double beta)</CODE>
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150
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151 <BR>
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152 Create a new gamma distribution with the given alpha and beta values.</TD>
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153 </TR>
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154 <TR BGCOLOR="white" CLASS="TableRowColor">
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155 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#GammaDistributionImpl(double, double, double)">GammaDistributionImpl</A></B>(double alpha,
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156 double beta,
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157 double inverseCumAccuracy)</CODE>
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158
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159 <BR>
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160 Create a new gamma distribution with the given alpha and beta values.</TD>
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161 </TR>
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162 </TABLE>
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163
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164 <!-- ========== METHOD SUMMARY =========== -->
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165
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166 <A NAME="method_summary"><!-- --></A>
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167 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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168 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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169 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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170 <B>Method Summary</B></FONT></TH>
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171 </TR>
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172 <TR BGCOLOR="white" CLASS="TableRowColor">
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173 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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174 <CODE> double</CODE></FONT></TD>
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175 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#cumulativeProbability(double)">cumulativeProbability</A></B>(double x)</CODE>
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176
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177 <BR>
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178 For this distribution, X, this method returns P(X < x).</TD>
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179 </TR>
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180 <TR BGCOLOR="white" CLASS="TableRowColor">
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181 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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182 <CODE> double</CODE></FONT></TD>
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183 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#density(double)">density</A></B>(double x)</CODE>
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184
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185 <BR>
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186 Returns the probability density for a particular point.</TD>
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187 </TR>
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188 <TR BGCOLOR="white" CLASS="TableRowColor">
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189 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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190 <CODE> double</CODE></FONT></TD>
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191 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#density(java.lang.Double)">density</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</A> x)</CODE>
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192
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193 <BR>
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194 <B>Deprecated.</B> <I></I> </TD>
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195 </TR>
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196 <TR BGCOLOR="white" CLASS="TableRowColor">
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197 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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198 <CODE> double</CODE></FONT></TD>
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199 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getAlpha()">getAlpha</A></B>()</CODE>
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200
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201 <BR>
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202 Access the shape parameter, alpha</TD>
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203 </TR>
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204 <TR BGCOLOR="white" CLASS="TableRowColor">
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205 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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206 <CODE> double</CODE></FONT></TD>
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207 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getBeta()">getBeta</A></B>()</CODE>
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208
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209 <BR>
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210 Access the scale parameter, beta</TD>
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211 </TR>
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212 <TR BGCOLOR="white" CLASS="TableRowColor">
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213 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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214 <CODE>protected double</CODE></FONT></TD>
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215 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getDomainLowerBound(double)">getDomainLowerBound</A></B>(double p)</CODE>
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216
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217 <BR>
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218 Access the domain value lower bound, based on <code>p</code>, used to
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219 bracket a CDF root.</TD>
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220 </TR>
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221 <TR BGCOLOR="white" CLASS="TableRowColor">
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222 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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223 <CODE>protected double</CODE></FONT></TD>
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224 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getDomainUpperBound(double)">getDomainUpperBound</A></B>(double p)</CODE>
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225
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226 <BR>
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227 Access the domain value upper bound, based on <code>p</code>, used to
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228 bracket a CDF root.</TD>
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229 </TR>
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230 <TR BGCOLOR="white" CLASS="TableRowColor">
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231 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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232 <CODE>protected double</CODE></FONT></TD>
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233 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getInitialDomain(double)">getInitialDomain</A></B>(double p)</CODE>
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234
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235 <BR>
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236 Access the initial domain value, based on <code>p</code>, used to
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237 bracket a CDF root.</TD>
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238 </TR>
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239 <TR BGCOLOR="white" CLASS="TableRowColor">
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240 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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241 <CODE>protected double</CODE></FONT></TD>
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242 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#getSolverAbsoluteAccuracy()">getSolverAbsoluteAccuracy</A></B>()</CODE>
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243
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244 <BR>
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245 Return the absolute accuracy setting of the solver used to estimate
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246 inverse cumulative probabilities.</TD>
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247 </TR>
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248 <TR BGCOLOR="white" CLASS="TableRowColor">
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249 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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250 <CODE> double</CODE></FONT></TD>
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251 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#inverseCumulativeProbability(double)">inverseCumulativeProbability</A></B>(double p)</CODE>
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252
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253 <BR>
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254 For this distribution, X, this method returns the critical point x, such
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255 that P(X < x) = <code>p</code>.</TD>
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256 </TR>
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257 <TR BGCOLOR="white" CLASS="TableRowColor">
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258 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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259 <CODE> void</CODE></FONT></TD>
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260 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#setAlpha(double)">setAlpha</A></B>(double alpha)</CODE>
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261
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262 <BR>
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263 <B>Deprecated.</B> <I>as of 2.1 (class will become immutable in 3.0)</I></TD>
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264 </TR>
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265 <TR BGCOLOR="white" CLASS="TableRowColor">
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266 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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267 <CODE> void</CODE></FONT></TD>
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268 <TD><CODE><B><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#setBeta(double)">setBeta</A></B>(double newBeta)</CODE>
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269
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270 <BR>
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271 <B>Deprecated.</B> <I>as of 2.1 (class will become immutable in 3.0)</I></TD>
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272 </TR>
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273 </TABLE>
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274 <A NAME="methods_inherited_from_class_org.apache.commons.math.distribution.AbstractDistribution"><!-- --></A>
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275 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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276 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
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277 <TH ALIGN="left"><B>Methods inherited from class org.apache.commons.math.distribution.<A HREF="../../../../../org/apache/commons/math/distribution/AbstractDistribution.html" title="class in org.apache.commons.math.distribution">AbstractDistribution</A></B></TH>
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278 </TR>
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279 <TR BGCOLOR="white" CLASS="TableRowColor">
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280 <TD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractDistribution.html#cumulativeProbability(double, double)">cumulativeProbability</A></CODE></TD>
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281 </TR>
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282 </TABLE>
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283 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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284 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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285 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
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286 <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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287 </TR>
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288 <TR BGCOLOR="white" CLASS="TableRowColor">
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289 <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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290 </TR>
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291 </TABLE>
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292 <A NAME="methods_inherited_from_class_org.apache.commons.math.distribution.Distribution"><!-- --></A>
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293 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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294 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
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295 <TH ALIGN="left"><B>Methods inherited from interface org.apache.commons.math.distribution.<A HREF="../../../../../org/apache/commons/math/distribution/Distribution.html" title="interface in org.apache.commons.math.distribution">Distribution</A></B></TH>
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296 </TR>
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297 <TR BGCOLOR="white" CLASS="TableRowColor">
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298 <TD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/Distribution.html#cumulativeProbability(double, double)">cumulativeProbability</A></CODE></TD>
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299 </TR>
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300 </TABLE>
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301
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302 <P>
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303
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304 <!-- ============ FIELD DETAIL =========== -->
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305
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306 <A NAME="field_detail"><!-- --></A>
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307 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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308 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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309 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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310 <B>Field Detail</B></FONT></TH>
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311 </TR>
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312 </TABLE>
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313
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314 <A NAME="DEFAULT_INVERSE_ABSOLUTE_ACCURACY"><!-- --></A><H3>
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315 DEFAULT_INVERSE_ABSOLUTE_ACCURACY</H3>
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316 <PRE>
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317 public static final double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.37"><B>DEFAULT_INVERSE_ABSOLUTE_ACCURACY</B></A></PRE>
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318 <DL>
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319 <DD>Default inverse cumulative probability accuracy
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320 <P>
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321 <DL>
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322 <DT><B>Since:</B></DT>
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323 <DD>2.1</DD>
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324 <DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.apache.commons.math.distribution.GammaDistributionImpl.DEFAULT_INVERSE_ABSOLUTE_ACCURACY">Constant Field Values</A></DL>
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325 </DL>
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326
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327 <!-- ========= CONSTRUCTOR DETAIL ======== -->
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328
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329 <A NAME="constructor_detail"><!-- --></A>
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330 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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331 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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332 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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333 <B>Constructor Detail</B></FONT></TH>
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334 </TR>
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335 </TABLE>
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336
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337 <A NAME="GammaDistributionImpl(double, double)"><!-- --></A><H3>
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338 GammaDistributionImpl</H3>
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339 <PRE>
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340 public <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.56"><B>GammaDistributionImpl</B></A>(double alpha,
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341 double beta)</PRE>
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342 <DL>
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343 <DD>Create a new gamma distribution with the given alpha and beta values.
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344 <P>
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345 <DL>
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346 <DT><B>Parameters:</B><DD><CODE>alpha</CODE> - the shape parameter.<DD><CODE>beta</CODE> - the scale parameter.</DL>
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347 </DL>
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348 <HR>
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349
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350 <A NAME="GammaDistributionImpl(double, double, double)"><!-- --></A><H3>
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351 GammaDistributionImpl</H3>
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352 <PRE>
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353 public <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.68"><B>GammaDistributionImpl</B></A>(double alpha,
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354 double beta,
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355 double inverseCumAccuracy)</PRE>
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356 <DL>
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357 <DD>Create a new gamma distribution with the given alpha and beta values.
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358 <P>
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359 <DL>
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360 <DT><B>Parameters:</B><DD><CODE>alpha</CODE> - the shape parameter.<DD><CODE>beta</CODE> - the scale parameter.<DD><CODE>inverseCumAccuracy</CODE> - the maximum absolute error in inverse cumulative probability estimates
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361 (defaults to <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#DEFAULT_INVERSE_ABSOLUTE_ACCURACY"><CODE>DEFAULT_INVERSE_ABSOLUTE_ACCURACY</CODE></A>)<DT><B>Since:</B></DT>
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362 <DD>2.1</DD>
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363 </DL>
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364 </DL>
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365
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366 <!-- ============ METHOD DETAIL ========== -->
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367
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368 <A NAME="method_detail"><!-- --></A>
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369 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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370 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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371 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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372 <B>Method Detail</B></FONT></TH>
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373 </TR>
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374 </TABLE>
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375
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376 <A NAME="cumulativeProbability(double)"><!-- --></A><H3>
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377 cumulativeProbability</H3>
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378 <PRE>
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379 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.92"><B>cumulativeProbability</B></A>(double x)
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380 throws <A HREF="../../../../../org/apache/commons/math/MathException.html" title="class in org.apache.commons.math">MathException</A></PRE>
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381 <DL>
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382 <DD>For this distribution, X, this method returns P(X < x).
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383
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384 The implementation of this method is based on:
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385 <ul>
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386 <li>
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387 <a href="http://mathworld.wolfram.com/Chi-SquaredDistribution.html">
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388 Chi-Squared Distribution</a>, equation (9).</li>
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389 <li>Casella, G., & Berger, R. (1990). <i>Statistical Inference</i>.
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390 Belmont, CA: Duxbury Press.</li>
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391 </ul>
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392 <P>
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393 <DD><DL>
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394 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/Distribution.html#cumulativeProbability(double)">cumulativeProbability</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/Distribution.html" title="interface in org.apache.commons.math.distribution">Distribution</A></CODE></DL>
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395 </DD>
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396 <DD><DL>
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397 <DT><B>Parameters:</B><DD><CODE>x</CODE> - the value at which the CDF is evaluated.
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398 <DT><B>Returns:</B><DD>CDF for this distribution.
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399 <DT><B>Throws:</B>
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400 <DD><CODE><A HREF="../../../../../org/apache/commons/math/MathException.html" title="class in org.apache.commons.math">MathException</A></CODE> - if the cumulative probability can not be
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401 computed due to convergence or other numerical errors.</DL>
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402 </DD>
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403 </DL>
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404 <HR>
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405
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406 <A NAME="inverseCumulativeProbability(double)"><!-- --></A><H3>
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407 inverseCumulativeProbability</H3>
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408 <PRE>
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409 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.118"><B>inverseCumulativeProbability</B></A>(double p)
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410 throws <A HREF="../../../../../org/apache/commons/math/MathException.html" title="class in org.apache.commons.math">MathException</A></PRE>
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411 <DL>
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412 <DD>For this distribution, X, this method returns the critical point x, such
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413 that P(X < x) = <code>p</code>.
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414 <p>
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415 Returns 0 for p=0 and <code>Double.POSITIVE_INFINITY</code> for p=1.</p>
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416 <P>
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417 <DD><DL>
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418 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/ContinuousDistribution.html#inverseCumulativeProbability(double)">inverseCumulativeProbability</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/ContinuousDistribution.html" title="interface in org.apache.commons.math.distribution">ContinuousDistribution</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#inverseCumulativeProbability(double)">inverseCumulativeProbability</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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419 </DD>
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420 <DD><DL>
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421 <DT><B>Parameters:</B><DD><CODE>p</CODE> - the desired probability
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422 <DT><B>Returns:</B><DD>x, such that P(X < x) = <code>p</code>
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423 <DT><B>Throws:</B>
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424 <DD><CODE><A HREF="../../../../../org/apache/commons/math/MathException.html" title="class in org.apache.commons.math">MathException</A></CODE> - if the inverse cumulative probability can not be
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425 computed due to convergence or other numerical errors.
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426 <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>p</code> is not a valid
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427 probability.</DL>
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428 </DD>
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429 </DL>
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430 <HR>
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431
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432 <A NAME="setAlpha(double)"><!-- --></A><H3>
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433 setAlpha</H3>
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434 <PRE>
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435 <FONT SIZE="-1"><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</A>
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436 </FONT>public void <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.136"><B>setAlpha</B></A>(double alpha)</PRE>
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437 <DL>
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438 <DD><B>Deprecated.</B> <I>as of 2.1 (class will become immutable in 3.0)</I>
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439 <P>
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440 <DD>Modify the shape parameter, alpha.
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441 <P>
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442 <DD><DL>
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443 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html#setAlpha(double)">setAlpha</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A></CODE></DL>
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444 </DD>
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445 <DD><DL>
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446 <DT><B>Parameters:</B><DD><CODE>alpha</CODE> - the new shape parameter.
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447 <DT><B>Throws:</B>
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448 <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>alpha</code> is not positive.</DL>
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449 </DD>
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450 </DL>
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451 <HR>
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452
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453 <A NAME="getAlpha()"><!-- --></A><H3>
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454 getAlpha</H3>
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455 <PRE>
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456 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.158"><B>getAlpha</B></A>()</PRE>
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457 <DL>
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458 <DD>Access the shape parameter, alpha
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459 <P>
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460 <DD><DL>
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461 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html#getAlpha()">getAlpha</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A></CODE></DL>
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462 </DD>
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463 <DD><DL>
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464
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465 <DT><B>Returns:</B><DD>alpha.</DL>
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466 </DD>
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467 </DL>
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468 <HR>
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469
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470 <A NAME="setBeta(double)"><!-- --></A><H3>
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471 setBeta</H3>
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472 <PRE>
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473 <FONT SIZE="-1"><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</A>
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474 </FONT>public void <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.169"><B>setBeta</B></A>(double newBeta)</PRE>
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475 <DL>
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476 <DD><B>Deprecated.</B> <I>as of 2.1 (class will become immutable in 3.0)</I>
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477 <P>
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478 <DD>Modify the scale parameter, beta.
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479 <P>
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480 <DD><DL>
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481 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html#setBeta(double)">setBeta</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A></CODE></DL>
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482 </DD>
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483 <DD><DL>
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484 <DT><B>Parameters:</B><DD><CODE>newBeta</CODE> - the new scale parameter.
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485 <DT><B>Throws:</B>
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486 <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>newBeta</code> is not positive.</DL>
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487 </DD>
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488 </DL>
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489 <HR>
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490
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491 <A NAME="getBeta()"><!-- --></A><H3>
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492 getBeta</H3>
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493 <PRE>
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494 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.191"><B>getBeta</B></A>()</PRE>
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495 <DL>
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496 <DD>Access the scale parameter, beta
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497 <P>
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498 <DD><DL>
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499 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html#getBeta()">getBeta</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A></CODE></DL>
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500 </DD>
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501 <DD><DL>
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502
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503 <DT><B>Returns:</B><DD>beta.</DL>
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504 </DD>
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505 </DL>
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506 <HR>
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507
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508 <A NAME="density(double)"><!-- --></A><H3>
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509 density</H3>
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510 <PRE>
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511 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.202"><B>density</B></A>(double x)</PRE>
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512 <DL>
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513 <DD>Returns the probability density for a particular point.
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514 <P>
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515 <DD><DL>
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516 <DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#density(double)">density</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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517 </DD>
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518 <DD><DL>
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519 <DT><B>Parameters:</B><DD><CODE>x</CODE> - The point at which the density should be computed.
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520 <DT><B>Returns:</B><DD>The pdf at point x.</DL>
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521 </DD>
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522 </DL>
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523 <HR>
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524
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525 <A NAME="density(java.lang.Double)"><!-- --></A><H3>
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526 density</H3>
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527 <PRE>
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528 public double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.214"><B>density</B></A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</A> x)</PRE>
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529 <DL>
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530 <DD><B>Deprecated.</B> <I></I>
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531 <P>
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532 <DD>Return the probability density for a particular point.
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533 <P>
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534 <DD><DL>
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535 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html#density(java.lang.Double)">density</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/GammaDistribution.html" title="interface in org.apache.commons.math.distribution">GammaDistribution</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/HasDensity.html#density(P)">density</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math/distribution/HasDensity.html" title="interface in org.apache.commons.math.distribution">HasDensity</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</A>></CODE></DL>
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536 </DD>
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537 <DD><DL>
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538 <DT><B>Parameters:</B><DD><CODE>x</CODE> - The point at which the density should be computed.
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539 <DT><B>Returns:</B><DD>The pdf at point x.</DL>
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540 </DD>
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541 </DL>
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542 <HR>
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543
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544 <A NAME="getDomainLowerBound(double)"><!-- --></A><H3>
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545 getDomainLowerBound</H3>
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546 <PRE>
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547 protected double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.228"><B>getDomainLowerBound</B></A>(double p)</PRE>
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548 <DL>
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549 <DD>Access the domain value lower bound, based on <code>p</code>, used to
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550 bracket a CDF root. This method is used by
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551 <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#inverseCumulativeProbability(double)"><CODE>inverseCumulativeProbability(double)</CODE></A> to find critical values.
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552 <P>
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553 <DD><DL>
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554 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#getDomainLowerBound(double)">getDomainLowerBound</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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555 </DD>
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556 <DD><DL>
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557 <DT><B>Parameters:</B><DD><CODE>p</CODE> - the desired probability for the critical value
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558 <DT><B>Returns:</B><DD>domain value lower bound, i.e.
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559 P(X < <i>lower bound</i>) < <code>p</code></DL>
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560 </DD>
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561 </DL>
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562 <HR>
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563
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564 <A NAME="getDomainUpperBound(double)"><!-- --></A><H3>
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565 getDomainUpperBound</H3>
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566 <PRE>
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567 protected double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.243"><B>getDomainUpperBound</B></A>(double p)</PRE>
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568 <DL>
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569 <DD>Access the domain value upper bound, based on <code>p</code>, used to
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570 bracket a CDF root. This method is used by
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571 <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#inverseCumulativeProbability(double)"><CODE>inverseCumulativeProbability(double)</CODE></A> to find critical values.
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572 <P>
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573 <DD><DL>
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574 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#getDomainUpperBound(double)">getDomainUpperBound</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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575 </DD>
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576 <DD><DL>
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577 <DT><B>Parameters:</B><DD><CODE>p</CODE> - the desired probability for the critical value
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578 <DT><B>Returns:</B><DD>domain value upper bound, i.e.
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579 P(X < <i>upper bound</i>) > <code>p</code></DL>
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580 </DD>
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581 </DL>
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582 <HR>
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583
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584 <A NAME="getInitialDomain(double)"><!-- --></A><H3>
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585 getInitialDomain</H3>
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586 <PRE>
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587 protected double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.270"><B>getInitialDomain</B></A>(double p)</PRE>
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588 <DL>
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589 <DD>Access the initial domain value, based on <code>p</code>, used to
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590 bracket a CDF root. This method is used by
|
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591 <A HREF="../../../../../org/apache/commons/math/distribution/GammaDistributionImpl.html#inverseCumulativeProbability(double)"><CODE>inverseCumulativeProbability(double)</CODE></A> to find critical values.
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592 <P>
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593 <DD><DL>
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594 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#getInitialDomain(double)">getInitialDomain</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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595 </DD>
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596 <DD><DL>
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597 <DT><B>Parameters:</B><DD><CODE>p</CODE> - the desired probability for the critical value
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598 <DT><B>Returns:</B><DD>initial domain value</DL>
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599 </DD>
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600 </DL>
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601 <HR>
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602
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603 <A NAME="getSolverAbsoluteAccuracy()"><!-- --></A><H3>
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604 getSolverAbsoluteAccuracy</H3>
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605 <PRE>
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606 protected double <A HREF="../../../../../src-html/org/apache/commons/math/distribution/GammaDistributionImpl.html#line.295"><B>getSolverAbsoluteAccuracy</B></A>()</PRE>
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607 <DL>
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608 <DD>Return the absolute accuracy setting of the solver used to estimate
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609 inverse cumulative probabilities.
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610 <P>
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611 <DD><DL>
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612 <DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html#getSolverAbsoluteAccuracy()">getSolverAbsoluteAccuracy</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math/distribution/AbstractContinuousDistribution.html" title="class in org.apache.commons.math.distribution">AbstractContinuousDistribution</A></CODE></DL>
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613 </DD>
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614 <DD><DL>
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615
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616 <DT><B>Returns:</B><DD>the solver absolute accuracy<DT><B>Since:</B></DT>
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617 <DD>2.1</DD>
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618 </DL>
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619 </DD>
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620 </DL>
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621 <!-- ========= END OF CLASS DATA ========= -->
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