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commons-math-2.1 added
| author | dwinter |
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| date | Tue, 04 Jan 2011 10:02:07 +0100 |
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<HTML> <BODY BGCOLOR="white"> <PRE> <FONT color="green">001</FONT> /*<a name="line.1"></a> <FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a> <FONT color="green">003</FONT> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a> <FONT color="green">004</FONT> * this work for additional information regarding copyright ownership.<a name="line.4"></a> <FONT color="green">005</FONT> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a> <FONT color="green">006</FONT> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a> <FONT color="green">007</FONT> * the License. You may obtain a copy of the License at<a name="line.7"></a> <FONT color="green">008</FONT> *<a name="line.8"></a> <FONT color="green">009</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a> <FONT color="green">010</FONT> *<a name="line.10"></a> <FONT color="green">011</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a> <FONT color="green">012</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a> <FONT color="green">013</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a> <FONT color="green">014</FONT> * See the License for the specific language governing permissions and<a name="line.14"></a> <FONT color="green">015</FONT> * limitations under the License.<a name="line.15"></a> <FONT color="green">016</FONT> */<a name="line.16"></a> <FONT color="green">017</FONT> <a name="line.17"></a> <FONT color="green">018</FONT> package org.apache.commons.math.linear;<a name="line.18"></a> <FONT color="green">019</FONT> <a name="line.19"></a> <FONT color="green">020</FONT> import java.io.Serializable;<a name="line.20"></a> <FONT color="green">021</FONT> <a name="line.21"></a> <FONT color="green">022</FONT> import org.apache.commons.math.MathRuntimeException;<a name="line.22"></a> <FONT color="green">023</FONT> <a name="line.23"></a> <FONT color="green">024</FONT> /**<a name="line.24"></a> <FONT color="green">025</FONT> * Implementation of RealMatrix using a double[][] array to store entries and<a name="line.25"></a> <FONT color="green">026</FONT> * <a href="http://www.math.gatech.edu/~bourbaki/math2601/Web-notes/2num.pdf"><a name="line.26"></a> <FONT color="green">027</FONT> * LU decomposition</a> to support linear system<a name="line.27"></a> <FONT color="green">028</FONT> * solution and inverse.<a name="line.28"></a> <FONT color="green">029</FONT> * <p><a name="line.29"></a> <FONT color="green">030</FONT> * The LU decomposition is performed as needed, to support the following operations: <ul><a name="line.30"></a> <FONT color="green">031</FONT> * <li>solve</li><a name="line.31"></a> <FONT color="green">032</FONT> * <li>isSingular</li><a name="line.32"></a> <FONT color="green">033</FONT> * <li>getDeterminant</li><a name="line.33"></a> <FONT color="green">034</FONT> * <li>inverse</li> </ul></p><a name="line.34"></a> <FONT color="green">035</FONT> * <p><a name="line.35"></a> <FONT color="green">036</FONT> * <strong>Usage notes</strong>:<br><a name="line.36"></a> <FONT color="green">037</FONT> * <ul><li><a name="line.37"></a> <FONT color="green">038</FONT> * The LU decomposition is cached and reused on subsequent calls.<a name="line.38"></a> <FONT color="green">039</FONT> * If data are modified via references to the underlying array obtained using<a name="line.39"></a> <FONT color="green">040</FONT> * <code>getDataRef()</code>, then the stored LU decomposition will not be<a name="line.40"></a> <FONT color="green">041</FONT> * discarded. In this case, you need to explicitly invoke<a name="line.41"></a> <FONT color="green">042</FONT> * <code>LUDecompose()</code> to recompute the decomposition<a name="line.42"></a> <FONT color="green">043</FONT> * before using any of the methods above.</li><a name="line.43"></a> <FONT color="green">044</FONT> * <li><a name="line.44"></a> <FONT color="green">045</FONT> * As specified in the {@link RealMatrix} interface, matrix element indexing<a name="line.45"></a> <FONT color="green">046</FONT> * is 0-based -- e.g., <code>getEntry(0, 0)</code><a name="line.46"></a> <FONT color="green">047</FONT> * returns the element in the first row, first column of the matrix.</li></ul><a name="line.47"></a> <FONT color="green">048</FONT> * </p><a name="line.48"></a> <FONT color="green">049</FONT> *<a name="line.49"></a> <FONT color="green">050</FONT> * @version $Revision: 811685 $ $Date: 2009-09-05 13:36:48 -0400 (Sat, 05 Sep 2009) $<a name="line.50"></a> <FONT color="green">051</FONT> * @deprecated as of 2.0 replaced by {@link Array2DRowRealMatrix}<a name="line.51"></a> <FONT color="green">052</FONT> */<a name="line.52"></a> <FONT color="green">053</FONT> @Deprecated<a name="line.53"></a> <FONT color="green">054</FONT> public class RealMatrixImpl extends AbstractRealMatrix implements Serializable {<a name="line.54"></a> <FONT color="green">055</FONT> <a name="line.55"></a> <FONT color="green">056</FONT> /** Serializable version identifier */<a name="line.56"></a> <FONT color="green">057</FONT> private static final long serialVersionUID = -1067294169172445528L;<a name="line.57"></a> <FONT color="green">058</FONT> <a name="line.58"></a> <FONT color="green">059</FONT> /** Entries of the matrix */<a name="line.59"></a> <FONT color="green">060</FONT> protected double data[][];<a name="line.60"></a> <FONT color="green">061</FONT> <a name="line.61"></a> <FONT color="green">062</FONT> /**<a name="line.62"></a> <FONT color="green">063</FONT> * Creates a matrix with no data<a name="line.63"></a> <FONT color="green">064</FONT> */<a name="line.64"></a> <FONT color="green">065</FONT> public RealMatrixImpl() {<a name="line.65"></a> <FONT color="green">066</FONT> }<a name="line.66"></a> <FONT color="green">067</FONT> <a name="line.67"></a> <FONT color="green">068</FONT> /**<a name="line.68"></a> <FONT color="green">069</FONT> * Create a new RealMatrix with the supplied row and column dimensions.<a name="line.69"></a> <FONT color="green">070</FONT> *<a name="line.70"></a> <FONT color="green">071</FONT> * @param rowDimension the number of rows in the new matrix<a name="line.71"></a> <FONT color="green">072</FONT> * @param columnDimension the number of columns in the new matrix<a name="line.72"></a> <FONT color="green">073</FONT> * @throws IllegalArgumentException if row or column dimension is not<a name="line.73"></a> <FONT color="green">074</FONT> * positive<a name="line.74"></a> <FONT color="green">075</FONT> */<a name="line.75"></a> <FONT color="green">076</FONT> public RealMatrixImpl(final int rowDimension, final int columnDimension)<a name="line.76"></a> <FONT color="green">077</FONT> throws IllegalArgumentException {<a name="line.77"></a> <FONT color="green">078</FONT> super(rowDimension, columnDimension);<a name="line.78"></a> <FONT color="green">079</FONT> data = new double[rowDimension][columnDimension];<a name="line.79"></a> <FONT color="green">080</FONT> }<a name="line.80"></a> <FONT color="green">081</FONT> <a name="line.81"></a> <FONT color="green">082</FONT> /**<a name="line.82"></a> <FONT color="green">083</FONT> * Create a new RealMatrix using the input array as the underlying<a name="line.83"></a> <FONT color="green">084</FONT> * data array.<a name="line.84"></a> <FONT color="green">085</FONT> * <p>The input array is copied, not referenced. This constructor has<a name="line.85"></a> <FONT color="green">086</FONT> * the same effect as calling {@link #RealMatrixImpl(double[][], boolean)}<a name="line.86"></a> <FONT color="green">087</FONT> * with the second argument set to <code>true</code>.</p><a name="line.87"></a> <FONT color="green">088</FONT> *<a name="line.88"></a> <FONT color="green">089</FONT> * @param d data for new matrix<a name="line.89"></a> <FONT color="green">090</FONT> * @throws IllegalArgumentException if <code>d</code> is not rectangular<a name="line.90"></a> <FONT color="green">091</FONT> * (not all rows have the same length) or empty<a name="line.91"></a> <FONT color="green">092</FONT> * @throws NullPointerException if <code>d</code> is null<a name="line.92"></a> <FONT color="green">093</FONT> * @see #RealMatrixImpl(double[][], boolean)<a name="line.93"></a> <FONT color="green">094</FONT> */<a name="line.94"></a> <FONT color="green">095</FONT> public RealMatrixImpl(final double[][] d)<a name="line.95"></a> <FONT color="green">096</FONT> throws IllegalArgumentException, NullPointerException {<a name="line.96"></a> <FONT color="green">097</FONT> copyIn(d);<a name="line.97"></a> <FONT color="green">098</FONT> }<a name="line.98"></a> <FONT color="green">099</FONT> <a name="line.99"></a> <FONT color="green">100</FONT> /**<a name="line.100"></a> <FONT color="green">101</FONT> * Create a new RealMatrix using the input array as the underlying<a name="line.101"></a> <FONT color="green">102</FONT> * data array.<a name="line.102"></a> <FONT color="green">103</FONT> * <p>If an array is built specially in order to be embedded in a<a name="line.103"></a> <FONT color="green">104</FONT> * RealMatrix and not used directly, the <code>copyArray</code> may be<a name="line.104"></a> <FONT color="green">105</FONT> * set to <code>false</code. This will prevent the copying and improve<a name="line.105"></a> <FONT color="green">106</FONT> * performance as no new array will be built and no data will be copied.</p><a name="line.106"></a> <FONT color="green">107</FONT> * @param d data for new matrix<a name="line.107"></a> <FONT color="green">108</FONT> * @param copyArray if true, the input array will be copied, otherwise<a name="line.108"></a> <FONT color="green">109</FONT> * it will be referenced<a name="line.109"></a> <FONT color="green">110</FONT> * @throws IllegalArgumentException if <code>d</code> is not rectangular<a name="line.110"></a> <FONT color="green">111</FONT> * (not all rows have the same length) or empty<a name="line.111"></a> <FONT color="green">112</FONT> * @throws NullPointerException if <code>d</code> is null<a name="line.112"></a> <FONT color="green">113</FONT> * @see #RealMatrixImpl(double[][])<a name="line.113"></a> <FONT color="green">114</FONT> */<a name="line.114"></a> <FONT color="green">115</FONT> public RealMatrixImpl(final double[][] d, final boolean copyArray)<a name="line.115"></a> <FONT color="green">116</FONT> throws IllegalArgumentException, NullPointerException {<a name="line.116"></a> <FONT color="green">117</FONT> if (copyArray) {<a name="line.117"></a> <FONT color="green">118</FONT> copyIn(d);<a name="line.118"></a> <FONT color="green">119</FONT> } else {<a name="line.119"></a> <FONT color="green">120</FONT> if (d == null) {<a name="line.120"></a> <FONT color="green">121</FONT> throw new NullPointerException();<a name="line.121"></a> <FONT color="green">122</FONT> }<a name="line.122"></a> <FONT color="green">123</FONT> final int nRows = d.length;<a name="line.123"></a> <FONT color="green">124</FONT> if (nRows == 0) {<a name="line.124"></a> <FONT color="green">125</FONT> throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one row");<a name="line.125"></a> <FONT color="green">126</FONT> }<a name="line.126"></a> <FONT color="green">127</FONT> final int nCols = d[0].length;<a name="line.127"></a> <FONT color="green">128</FONT> if (nCols == 0) {<a name="line.128"></a> <FONT color="green">129</FONT> throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one column");<a name="line.129"></a> <FONT color="green">130</FONT> }<a name="line.130"></a> <FONT color="green">131</FONT> for (int r = 1; r < nRows; r++) {<a name="line.131"></a> <FONT color="green">132</FONT> if (d[r].length != nCols) {<a name="line.132"></a> <FONT color="green">133</FONT> throw MathRuntimeException.createIllegalArgumentException(<a name="line.133"></a> <FONT color="green">134</FONT> "some rows have length {0} while others have length {1}",<a name="line.134"></a> <FONT color="green">135</FONT> nCols, d[r].length);<a name="line.135"></a> <FONT color="green">136</FONT> }<a name="line.136"></a> <FONT color="green">137</FONT> }<a name="line.137"></a> <FONT color="green">138</FONT> data = d;<a name="line.138"></a> <FONT color="green">139</FONT> }<a name="line.139"></a> <FONT color="green">140</FONT> }<a name="line.140"></a> <FONT color="green">141</FONT> <a name="line.141"></a> <FONT color="green">142</FONT> /**<a name="line.142"></a> <FONT color="green">143</FONT> * Create a new (column) RealMatrix using <code>v</code> as the<a name="line.143"></a> <FONT color="green">144</FONT> * data for the unique column of the <code>v.length x 1</code> matrix<a name="line.144"></a> <FONT color="green">145</FONT> * created.<a name="line.145"></a> <FONT color="green">146</FONT> * <p>The input array is copied, not referenced.</p><a name="line.146"></a> <FONT color="green">147</FONT> *<a name="line.147"></a> <FONT color="green">148</FONT> * @param v column vector holding data for new matrix<a name="line.148"></a> <FONT color="green">149</FONT> */<a name="line.149"></a> <FONT color="green">150</FONT> public RealMatrixImpl(final double[] v) {<a name="line.150"></a> <FONT color="green">151</FONT> final int nRows = v.length;<a name="line.151"></a> <FONT color="green">152</FONT> data = new double[nRows][1];<a name="line.152"></a> <FONT color="green">153</FONT> for (int row = 0; row < nRows; row++) {<a name="line.153"></a> <FONT color="green">154</FONT> data[row][0] = v[row];<a name="line.154"></a> <FONT color="green">155</FONT> }<a name="line.155"></a> <FONT color="green">156</FONT> }<a name="line.156"></a> <FONT color="green">157</FONT> <a name="line.157"></a> <FONT color="green">158</FONT> /** {@inheritDoc} */<a name="line.158"></a> <FONT color="green">159</FONT> @Override<a name="line.159"></a> <FONT color="green">160</FONT> public RealMatrix createMatrix(final int rowDimension, final int columnDimension)<a name="line.160"></a> <FONT color="green">161</FONT> throws IllegalArgumentException {<a name="line.161"></a> <FONT color="green">162</FONT> return new RealMatrixImpl(rowDimension, columnDimension);<a name="line.162"></a> <FONT color="green">163</FONT> }<a name="line.163"></a> <FONT color="green">164</FONT> <a name="line.164"></a> <FONT color="green">165</FONT> /** {@inheritDoc} */<a name="line.165"></a> <FONT color="green">166</FONT> @Override<a name="line.166"></a> <FONT color="green">167</FONT> public RealMatrix copy() {<a name="line.167"></a> <FONT color="green">168</FONT> return new RealMatrixImpl(copyOut(), false);<a name="line.168"></a> <FONT color="green">169</FONT> }<a name="line.169"></a> <FONT color="green">170</FONT> <a name="line.170"></a> <FONT color="green">171</FONT> /** {@inheritDoc} */<a name="line.171"></a> <FONT color="green">172</FONT> @Override<a name="line.172"></a> <FONT color="green">173</FONT> public RealMatrix add(final RealMatrix m)<a name="line.173"></a> <FONT color="green">174</FONT> throws IllegalArgumentException {<a name="line.174"></a> <FONT color="green">175</FONT> try {<a name="line.175"></a> <FONT color="green">176</FONT> return add((RealMatrixImpl) m);<a name="line.176"></a> <FONT color="green">177</FONT> } catch (ClassCastException cce) {<a name="line.177"></a> <FONT color="green">178</FONT> return super.add(m);<a name="line.178"></a> <FONT color="green">179</FONT> }<a name="line.179"></a> <FONT color="green">180</FONT> }<a name="line.180"></a> <FONT color="green">181</FONT> <a name="line.181"></a> <FONT color="green">182</FONT> /**<a name="line.182"></a> <FONT color="green">183</FONT> * Compute the sum of this and <code>m</code>.<a name="line.183"></a> <FONT color="green">184</FONT> *<a name="line.184"></a> <FONT color="green">185</FONT> * @param m matrix to be added<a name="line.185"></a> <FONT color="green">186</FONT> * @return this + m<a name="line.186"></a> <FONT color="green">187</FONT> * @throws IllegalArgumentException if m is not the same size as this<a name="line.187"></a> <FONT color="green">188</FONT> */<a name="line.188"></a> <FONT color="green">189</FONT> public RealMatrixImpl add(final RealMatrixImpl m)<a name="line.189"></a> <FONT color="green">190</FONT> throws IllegalArgumentException {<a name="line.190"></a> <FONT color="green">191</FONT> <a name="line.191"></a> <FONT color="green">192</FONT> // safety check<a name="line.192"></a> <FONT color="green">193</FONT> MatrixUtils.checkAdditionCompatible(this, m);<a name="line.193"></a> <FONT color="green">194</FONT> <a name="line.194"></a> <FONT color="green">195</FONT> final int rowCount = getRowDimension();<a name="line.195"></a> <FONT color="green">196</FONT> final int columnCount = getColumnDimension();<a name="line.196"></a> <FONT color="green">197</FONT> final double[][] outData = new double[rowCount][columnCount];<a name="line.197"></a> <FONT color="green">198</FONT> for (int row = 0; row < rowCount; row++) {<a name="line.198"></a> <FONT color="green">199</FONT> final double[] dataRow = data[row];<a name="line.199"></a> <FONT color="green">200</FONT> final double[] mRow = m.data[row];<a name="line.200"></a> <FONT color="green">201</FONT> final double[] outDataRow = outData[row];<a name="line.201"></a> <FONT color="green">202</FONT> for (int col = 0; col < columnCount; col++) {<a name="line.202"></a> <FONT color="green">203</FONT> outDataRow[col] = dataRow[col] + mRow[col];<a name="line.203"></a> <FONT color="green">204</FONT> }<a name="line.204"></a> <FONT color="green">205</FONT> }<a name="line.205"></a> <FONT color="green">206</FONT> <a name="line.206"></a> <FONT color="green">207</FONT> return new RealMatrixImpl(outData, false);<a name="line.207"></a> <FONT color="green">208</FONT> <a name="line.208"></a> <FONT color="green">209</FONT> }<a name="line.209"></a> <FONT color="green">210</FONT> <a name="line.210"></a> <FONT color="green">211</FONT> /** {@inheritDoc} */<a name="line.211"></a> <FONT color="green">212</FONT> @Override<a name="line.212"></a> <FONT color="green">213</FONT> public RealMatrix subtract(final RealMatrix m)<a name="line.213"></a> <FONT color="green">214</FONT> throws IllegalArgumentException {<a name="line.214"></a> <FONT color="green">215</FONT> try {<a name="line.215"></a> <FONT color="green">216</FONT> return subtract((RealMatrixImpl) m);<a name="line.216"></a> <FONT color="green">217</FONT> } catch (ClassCastException cce) {<a name="line.217"></a> <FONT color="green">218</FONT> return super.subtract(m);<a name="line.218"></a> <FONT color="green">219</FONT> }<a name="line.219"></a> <FONT color="green">220</FONT> }<a name="line.220"></a> <FONT color="green">221</FONT> <a name="line.221"></a> <FONT color="green">222</FONT> /**<a name="line.222"></a> <FONT color="green">223</FONT> * Compute this minus <code>m</code>.<a name="line.223"></a> <FONT color="green">224</FONT> *<a name="line.224"></a> <FONT color="green">225</FONT> * @param m matrix to be subtracted<a name="line.225"></a> <FONT color="green">226</FONT> * @return this + m<a name="line.226"></a> <FONT color="green">227</FONT> * @throws IllegalArgumentException if m is not the same size as this<a name="line.227"></a> <FONT color="green">228</FONT> */<a name="line.228"></a> <FONT color="green">229</FONT> public RealMatrixImpl subtract(final RealMatrixImpl m)<a name="line.229"></a> <FONT color="green">230</FONT> throws IllegalArgumentException {<a name="line.230"></a> <FONT color="green">231</FONT> <a name="line.231"></a> <FONT color="green">232</FONT> // safety check<a name="line.232"></a> <FONT color="green">233</FONT> MatrixUtils.checkSubtractionCompatible(this, m);<a name="line.233"></a> <FONT color="green">234</FONT> <a name="line.234"></a> <FONT color="green">235</FONT> final int rowCount = getRowDimension();<a name="line.235"></a> <FONT color="green">236</FONT> final int columnCount = getColumnDimension();<a name="line.236"></a> <FONT color="green">237</FONT> final double[][] outData = new double[rowCount][columnCount];<a name="line.237"></a> <FONT color="green">238</FONT> for (int row = 0; row < rowCount; row++) {<a name="line.238"></a> <FONT color="green">239</FONT> final double[] dataRow = data[row];<a name="line.239"></a> <FONT color="green">240</FONT> final double[] mRow = m.data[row];<a name="line.240"></a> <FONT color="green">241</FONT> final double[] outDataRow = outData[row];<a name="line.241"></a> <FONT color="green">242</FONT> for (int col = 0; col < columnCount; col++) {<a name="line.242"></a> <FONT color="green">243</FONT> outDataRow[col] = dataRow[col] - mRow[col];<a name="line.243"></a> <FONT color="green">244</FONT> }<a name="line.244"></a> <FONT color="green">245</FONT> }<a name="line.245"></a> <FONT color="green">246</FONT> <a name="line.246"></a> <FONT color="green">247</FONT> return new RealMatrixImpl(outData, false);<a name="line.247"></a> <FONT color="green">248</FONT> <a name="line.248"></a> <FONT color="green">249</FONT> }<a name="line.249"></a> <FONT color="green">250</FONT> <a name="line.250"></a> <FONT color="green">251</FONT> /** {@inheritDoc} */<a name="line.251"></a> <FONT color="green">252</FONT> @Override<a name="line.252"></a> <FONT color="green">253</FONT> public RealMatrix multiply(final RealMatrix m)<a name="line.253"></a> <FONT color="green">254</FONT> throws IllegalArgumentException {<a name="line.254"></a> <FONT color="green">255</FONT> try {<a name="line.255"></a> <FONT color="green">256</FONT> return multiply((RealMatrixImpl) m);<a name="line.256"></a> <FONT color="green">257</FONT> } catch (ClassCastException cce) {<a name="line.257"></a> <FONT color="green">258</FONT> return super.multiply(m);<a name="line.258"></a> <FONT color="green">259</FONT> }<a name="line.259"></a> <FONT color="green">260</FONT> }<a name="line.260"></a> <FONT color="green">261</FONT> <a name="line.261"></a> <FONT color="green">262</FONT> /**<a name="line.262"></a> <FONT color="green">263</FONT> * Returns the result of postmultiplying this by <code>m</code>.<a name="line.263"></a> <FONT color="green">264</FONT> * @param m matrix to postmultiply by<a name="line.264"></a> <FONT color="green">265</FONT> * @return this*m<a name="line.265"></a> <FONT color="green">266</FONT> * @throws IllegalArgumentException<a name="line.266"></a> <FONT color="green">267</FONT> * if columnDimension(this) != rowDimension(m)<a name="line.267"></a> <FONT color="green">268</FONT> */<a name="line.268"></a> <FONT color="green">269</FONT> public RealMatrixImpl multiply(final RealMatrixImpl m)<a name="line.269"></a> <FONT color="green">270</FONT> throws IllegalArgumentException {<a name="line.270"></a> <FONT color="green">271</FONT> <a name="line.271"></a> <FONT color="green">272</FONT> // safety check<a name="line.272"></a> <FONT color="green">273</FONT> MatrixUtils.checkMultiplicationCompatible(this, m);<a name="line.273"></a> <FONT color="green">274</FONT> <a name="line.274"></a> <FONT color="green">275</FONT> final int nRows = this.getRowDimension();<a name="line.275"></a> <FONT color="green">276</FONT> final int nCols = m.getColumnDimension();<a name="line.276"></a> <FONT color="green">277</FONT> final int nSum = this.getColumnDimension();<a name="line.277"></a> <FONT color="green">278</FONT> final double[][] outData = new double[nRows][nCols];<a name="line.278"></a> <FONT color="green">279</FONT> for (int row = 0; row < nRows; row++) {<a name="line.279"></a> <FONT color="green">280</FONT> final double[] dataRow = data[row];<a name="line.280"></a> <FONT color="green">281</FONT> final double[] outDataRow = outData[row];<a name="line.281"></a> <FONT color="green">282</FONT> for (int col = 0; col < nCols; col++) {<a name="line.282"></a> <FONT color="green">283</FONT> double sum = 0;<a name="line.283"></a> <FONT color="green">284</FONT> for (int i = 0; i < nSum; i++) {<a name="line.284"></a> <FONT color="green">285</FONT> sum += dataRow[i] * m.data[i][col];<a name="line.285"></a> <FONT color="green">286</FONT> }<a name="line.286"></a> <FONT color="green">287</FONT> outDataRow[col] = sum;<a name="line.287"></a> <FONT color="green">288</FONT> }<a name="line.288"></a> <FONT color="green">289</FONT> }<a name="line.289"></a> <FONT color="green">290</FONT> <a name="line.290"></a> <FONT color="green">291</FONT> return new RealMatrixImpl(outData, false);<a name="line.291"></a> <FONT color="green">292</FONT> <a name="line.292"></a> <FONT color="green">293</FONT> }<a name="line.293"></a> <FONT color="green">294</FONT> <a name="line.294"></a> <FONT color="green">295</FONT> /** {@inheritDoc} */<a name="line.295"></a> <FONT color="green">296</FONT> @Override<a name="line.296"></a> <FONT color="green">297</FONT> public double[][] getData() {<a name="line.297"></a> <FONT color="green">298</FONT> return copyOut();<a name="line.298"></a> <FONT color="green">299</FONT> }<a name="line.299"></a> <FONT color="green">300</FONT> <a name="line.300"></a> <FONT color="green">301</FONT> /**<a name="line.301"></a> <FONT color="green">302</FONT> * Returns a reference to the underlying data array.<a name="line.302"></a> <FONT color="green">303</FONT> * <p><a name="line.303"></a> <FONT color="green">304</FONT> * Does <strong>not</strong> make a fresh copy of the underlying data.</p><a name="line.304"></a> <FONT color="green">305</FONT> *<a name="line.305"></a> <FONT color="green">306</FONT> * @return 2-dimensional array of entries<a name="line.306"></a> <FONT color="green">307</FONT> */<a name="line.307"></a> <FONT color="green">308</FONT> public double[][] getDataRef() {<a name="line.308"></a> <FONT color="green">309</FONT> return data;<a name="line.309"></a> <FONT color="green">310</FONT> }<a name="line.310"></a> <FONT color="green">311</FONT> <a name="line.311"></a> <FONT color="green">312</FONT> /** {@inheritDoc} */<a name="line.312"></a> <FONT color="green">313</FONT> @Override<a name="line.313"></a> <FONT color="green">314</FONT> public void setSubMatrix(final double[][] subMatrix, final int row, final int column)<a name="line.314"></a> <FONT color="green">315</FONT> throws MatrixIndexException {<a name="line.315"></a> <FONT color="green">316</FONT> if (data == null) {<a name="line.316"></a> <FONT color="green">317</FONT> if (row > 0) {<a name="line.317"></a> <FONT color="green">318</FONT> throw MathRuntimeException.createIllegalStateException(<a name="line.318"></a> <FONT color="green">319</FONT> "first {0} rows are not initialized yet",<a name="line.319"></a> <FONT color="green">320</FONT> row);<a name="line.320"></a> <FONT color="green">321</FONT> }<a name="line.321"></a> <FONT color="green">322</FONT> if (column > 0) {<a name="line.322"></a> <FONT color="green">323</FONT> throw MathRuntimeException.createIllegalStateException(<a name="line.323"></a> <FONT color="green">324</FONT> "first {0} columns are not initialized yet",<a name="line.324"></a> <FONT color="green">325</FONT> column);<a name="line.325"></a> <FONT color="green">326</FONT> }<a name="line.326"></a> <FONT color="green">327</FONT> final int nRows = subMatrix.length;<a name="line.327"></a> <FONT color="green">328</FONT> if (nRows == 0) {<a name="line.328"></a> <FONT color="green">329</FONT> throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one row");<a name="line.329"></a> <FONT color="green">330</FONT> }<a name="line.330"></a> <FONT color="green">331</FONT> <a name="line.331"></a> <FONT color="green">332</FONT> final int nCols = subMatrix[0].length;<a name="line.332"></a> <FONT color="green">333</FONT> if (nCols == 0) {<a name="line.333"></a> <FONT color="green">334</FONT> throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one column");<a name="line.334"></a> <FONT color="green">335</FONT> }<a name="line.335"></a> <FONT color="green">336</FONT> data = new double[subMatrix.length][nCols];<a name="line.336"></a> <FONT color="green">337</FONT> for (int i = 0; i < data.length; ++i) {<a name="line.337"></a> <FONT color="green">338</FONT> if (subMatrix[i].length != nCols) {<a name="line.338"></a> <FONT color="green">339</FONT> throw MathRuntimeException.createIllegalArgumentException(<a name="line.339"></a> <FONT color="green">340</FONT> "some rows have length {0} while others have length {1}",<a name="line.340"></a> <FONT color="green">341</FONT> nCols, subMatrix[i].length);<a name="line.341"></a> <FONT color="green">342</FONT> }<a name="line.342"></a> <FONT color="green">343</FONT> System.arraycopy(subMatrix[i], 0, data[i + row], column, nCols);<a name="line.343"></a> <FONT color="green">344</FONT> }<a name="line.344"></a> <FONT color="green">345</FONT> } else {<a name="line.345"></a> <FONT color="green">346</FONT> super.setSubMatrix(subMatrix, row, column);<a name="line.346"></a> <FONT color="green">347</FONT> }<a name="line.347"></a> <FONT color="green">348</FONT> <a name="line.348"></a> <FONT color="green">349</FONT> }<a name="line.349"></a> <FONT color="green">350</FONT> <a name="line.350"></a> <FONT color="green">351</FONT> /** {@inheritDoc} */<a name="line.351"></a> <FONT color="green">352</FONT> @Override<a name="line.352"></a> <FONT color="green">353</FONT> public double getEntry(final int row, final int column)<a name="line.353"></a> <FONT color="green">354</FONT> throws MatrixIndexException {<a name="line.354"></a> <FONT color="green">355</FONT> try {<a name="line.355"></a> <FONT color="green">356</FONT> return data[row][column];<a name="line.356"></a> <FONT color="green">357</FONT> } catch (ArrayIndexOutOfBoundsException e) {<a name="line.357"></a> <FONT color="green">358</FONT> throw new MatrixIndexException(<a name="line.358"></a> <FONT color="green">359</FONT> "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.359"></a> <FONT color="green">360</FONT> row, column, getRowDimension(), getColumnDimension());<a name="line.360"></a> <FONT color="green">361</FONT> }<a name="line.361"></a> <FONT color="green">362</FONT> }<a name="line.362"></a> <FONT color="green">363</FONT> <a name="line.363"></a> <FONT color="green">364</FONT> /** {@inheritDoc} */<a name="line.364"></a> <FONT color="green">365</FONT> @Override<a name="line.365"></a> <FONT color="green">366</FONT> public void setEntry(final int row, final int column, final double value)<a name="line.366"></a> <FONT color="green">367</FONT> throws MatrixIndexException {<a name="line.367"></a> <FONT color="green">368</FONT> try {<a name="line.368"></a> <FONT color="green">369</FONT> data[row][column] = value;<a name="line.369"></a> <FONT color="green">370</FONT> } catch (ArrayIndexOutOfBoundsException e) {<a name="line.370"></a> <FONT color="green">371</FONT> throw new MatrixIndexException(<a name="line.371"></a> <FONT color="green">372</FONT> "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.372"></a> <FONT color="green">373</FONT> row, column, getRowDimension(), getColumnDimension());<a name="line.373"></a> <FONT color="green">374</FONT> }<a name="line.374"></a> <FONT color="green">375</FONT> }<a name="line.375"></a> <FONT color="green">376</FONT> <a name="line.376"></a> <FONT color="green">377</FONT> /** {@inheritDoc} */<a name="line.377"></a> <FONT color="green">378</FONT> @Override<a name="line.378"></a> <FONT color="green">379</FONT> public void addToEntry(final int row, final int column, final double increment)<a name="line.379"></a> <FONT color="green">380</FONT> throws MatrixIndexException {<a name="line.380"></a> <FONT color="green">381</FONT> try {<a name="line.381"></a> <FONT color="green">382</FONT> data[row][column] += increment;<a name="line.382"></a> <FONT color="green">383</FONT> } catch (ArrayIndexOutOfBoundsException e) {<a name="line.383"></a> <FONT color="green">384</FONT> throw new MatrixIndexException(<a name="line.384"></a> <FONT color="green">385</FONT> "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.385"></a> <FONT color="green">386</FONT> row, column, getRowDimension(), getColumnDimension());<a name="line.386"></a> <FONT color="green">387</FONT> }<a name="line.387"></a> <FONT color="green">388</FONT> }<a name="line.388"></a> <FONT color="green">389</FONT> <a name="line.389"></a> <FONT color="green">390</FONT> /** {@inheritDoc} */<a name="line.390"></a> <FONT color="green">391</FONT> @Override<a name="line.391"></a> <FONT color="green">392</FONT> public void multiplyEntry(final int row, final int column, final double factor)<a name="line.392"></a> <FONT color="green">393</FONT> throws MatrixIndexException {<a name="line.393"></a> <FONT color="green">394</FONT> try {<a name="line.394"></a> <FONT color="green">395</FONT> data[row][column] *= factor;<a name="line.395"></a> <FONT color="green">396</FONT> } catch (ArrayIndexOutOfBoundsException e) {<a name="line.396"></a> <FONT color="green">397</FONT> throw new MatrixIndexException(<a name="line.397"></a> <FONT color="green">398</FONT> "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.398"></a> <FONT color="green">399</FONT> row, column, getRowDimension(), getColumnDimension());<a name="line.399"></a> <FONT color="green">400</FONT> }<a name="line.400"></a> <FONT color="green">401</FONT> }<a name="line.401"></a> <FONT color="green">402</FONT> <a name="line.402"></a> <FONT color="green">403</FONT> /** {@inheritDoc} */<a name="line.403"></a> <FONT color="green">404</FONT> @Override<a name="line.404"></a> <FONT color="green">405</FONT> public int getRowDimension() {<a name="line.405"></a> <FONT color="green">406</FONT> return (data == null) ? 0 : data.length;<a name="line.406"></a> <FONT color="green">407</FONT> }<a name="line.407"></a> <FONT color="green">408</FONT> <a name="line.408"></a> <FONT color="green">409</FONT> /** {@inheritDoc} */<a name="line.409"></a> <FONT color="green">410</FONT> @Override<a name="line.410"></a> <FONT color="green">411</FONT> public int getColumnDimension() {<a name="line.411"></a> <FONT color="green">412</FONT> return ((data == null) || (data[0] == null)) ? 0 : data[0].length;<a name="line.412"></a> <FONT color="green">413</FONT> }<a name="line.413"></a> <FONT color="green">414</FONT> <a name="line.414"></a> <FONT color="green">415</FONT> /** {@inheritDoc} */<a name="line.415"></a> <FONT color="green">416</FONT> @Override<a name="line.416"></a> <FONT color="green">417</FONT> public double[] operate(final double[] v)<a name="line.417"></a> <FONT color="green">418</FONT> throws IllegalArgumentException {<a name="line.418"></a> <FONT color="green">419</FONT> final int nRows = this.getRowDimension();<a name="line.419"></a> <FONT color="green">420</FONT> final int nCols = this.getColumnDimension();<a name="line.420"></a> <FONT color="green">421</FONT> if (v.length != nCols) {<a name="line.421"></a> <FONT color="green">422</FONT> throw MathRuntimeException.createIllegalArgumentException(<a name="line.422"></a> <FONT color="green">423</FONT> "vector length mismatch: got {0} but expected {1}",<a name="line.423"></a> <FONT color="green">424</FONT> v.length, nCols);<a name="line.424"></a> <FONT color="green">425</FONT> }<a name="line.425"></a> <FONT color="green">426</FONT> final double[] out = new double[nRows];<a name="line.426"></a> <FONT color="green">427</FONT> for (int row = 0; row < nRows; row++) {<a name="line.427"></a> <FONT color="green">428</FONT> final double[] dataRow = data[row];<a name="line.428"></a> <FONT color="green">429</FONT> double sum = 0;<a name="line.429"></a> <FONT color="green">430</FONT> for (int i = 0; i < nCols; i++) {<a name="line.430"></a> <FONT color="green">431</FONT> sum += dataRow[i] * v[i];<a name="line.431"></a> <FONT color="green">432</FONT> }<a name="line.432"></a> <FONT color="green">433</FONT> out[row] = sum;<a name="line.433"></a> <FONT color="green">434</FONT> }<a name="line.434"></a> <FONT color="green">435</FONT> return out;<a name="line.435"></a> <FONT color="green">436</FONT> }<a name="line.436"></a> <FONT color="green">437</FONT> <a name="line.437"></a> <FONT color="green">438</FONT> /** {@inheritDoc} */<a name="line.438"></a> <FONT color="green">439</FONT> @Override<a name="line.439"></a> <FONT color="green">440</FONT> public double[] preMultiply(final double[] v)<a name="line.440"></a> <FONT color="green">441</FONT> throws IllegalArgumentException {<a name="line.441"></a> <FONT color="green">442</FONT> <a name="line.442"></a> <FONT color="green">443</FONT> final int nRows = getRowDimension();<a name="line.443"></a> <FONT color="green">444</FONT> final int nCols = getColumnDimension();<a name="line.444"></a> <FONT color="green">445</FONT> if (v.length != nRows) {<a name="line.445"></a> <FONT color="green">446</FONT> throw MathRuntimeException.createIllegalArgumentException(<a name="line.446"></a> <FONT color="green">447</FONT> "vector length mismatch: got {0} but expected {1}",<a name="line.447"></a> <FONT color="green">448</FONT> v.length, nRows);<a name="line.448"></a> <FONT color="green">449</FONT> }<a name="line.449"></a> <FONT color="green">450</FONT> <a name="line.450"></a> <FONT color="green">451</FONT> final double[] out = new double[nCols];<a name="line.451"></a> <FONT color="green">452</FONT> for (int col = 0; col < nCols; ++col) {<a name="line.452"></a> <FONT color="green">453</FONT> double sum = 0;<a name="line.453"></a> <FONT color="green">454</FONT> for (int i = 0; i < nRows; ++i) {<a name="line.454"></a> <FONT color="green">455</FONT> sum += data[i][col] * v[i];<a name="line.455"></a> <FONT color="green">456</FONT> }<a name="line.456"></a> <FONT color="green">457</FONT> out[col] = sum;<a name="line.457"></a> <FONT color="green">458</FONT> }<a name="line.458"></a> <FONT color="green">459</FONT> <a name="line.459"></a> <FONT color="green">460</FONT> return out;<a name="line.460"></a> <FONT color="green">461</FONT> <a name="line.461"></a> <FONT color="green">462</FONT> }<a name="line.462"></a> <FONT color="green">463</FONT> <a name="line.463"></a> <FONT color="green">464</FONT> /** {@inheritDoc} */<a name="line.464"></a> <FONT color="green">465</FONT> @Override<a name="line.465"></a> <FONT color="green">466</FONT> public double walkInRowOrder(final RealMatrixChangingVisitor visitor)<a name="line.466"></a> <FONT color="green">467</FONT> throws MatrixVisitorException {<a name="line.467"></a> <FONT color="green">468</FONT> final int rows = getRowDimension();<a name="line.468"></a> <FONT color="green">469</FONT> final int columns = getColumnDimension();<a name="line.469"></a> <FONT color="green">470</FONT> visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.470"></a> <FONT color="green">471</FONT> for (int i = 0; i < rows; ++i) {<a name="line.471"></a> <FONT color="green">472</FONT> final double[] rowI = data[i];<a name="line.472"></a> <FONT color="green">473</FONT> for (int j = 0; j < columns; ++j) {<a name="line.473"></a> <FONT color="green">474</FONT> rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.474"></a> <FONT color="green">475</FONT> }<a name="line.475"></a> <FONT color="green">476</FONT> }<a name="line.476"></a> <FONT color="green">477</FONT> return visitor.end();<a name="line.477"></a> <FONT color="green">478</FONT> }<a name="line.478"></a> <FONT color="green">479</FONT> <a name="line.479"></a> <FONT color="green">480</FONT> /** {@inheritDoc} */<a name="line.480"></a> <FONT color="green">481</FONT> @Override<a name="line.481"></a> <FONT color="green">482</FONT> public double walkInRowOrder(final RealMatrixPreservingVisitor visitor)<a name="line.482"></a> <FONT color="green">483</FONT> throws MatrixVisitorException {<a name="line.483"></a> <FONT color="green">484</FONT> final int rows = getRowDimension();<a name="line.484"></a> <FONT color="green">485</FONT> final int columns = getColumnDimension();<a name="line.485"></a> <FONT color="green">486</FONT> visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.486"></a> <FONT color="green">487</FONT> for (int i = 0; i < rows; ++i) {<a name="line.487"></a> <FONT color="green">488</FONT> final double[] rowI = data[i];<a name="line.488"></a> <FONT color="green">489</FONT> for (int j = 0; j < columns; ++j) {<a name="line.489"></a> <FONT color="green">490</FONT> visitor.visit(i, j, rowI[j]);<a name="line.490"></a> <FONT color="green">491</FONT> }<a name="line.491"></a> <FONT color="green">492</FONT> }<a name="line.492"></a> <FONT color="green">493</FONT> return visitor.end();<a name="line.493"></a> <FONT color="green">494</FONT> }<a name="line.494"></a> <FONT color="green">495</FONT> <a name="line.495"></a> <FONT color="green">496</FONT> /** {@inheritDoc} */<a name="line.496"></a> <FONT color="green">497</FONT> @Override<a name="line.497"></a> <FONT color="green">498</FONT> public double walkInRowOrder(final RealMatrixChangingVisitor visitor,<a name="line.498"></a> <FONT color="green">499</FONT> final int startRow, final int endRow,<a name="line.499"></a> <FONT color="green">500</FONT> final int startColumn, final int endColumn)<a name="line.500"></a> <FONT color="green">501</FONT> throws MatrixIndexException, MatrixVisitorException {<a name="line.501"></a> <FONT color="green">502</FONT> MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.502"></a> <FONT color="green">503</FONT> visitor.start(getRowDimension(), getColumnDimension(),<a name="line.503"></a> <FONT color="green">504</FONT> startRow, endRow, startColumn, endColumn);<a name="line.504"></a> <FONT color="green">505</FONT> for (int i = startRow; i <= endRow; ++i) {<a name="line.505"></a> <FONT color="green">506</FONT> final double[] rowI = data[i];<a name="line.506"></a> <FONT color="green">507</FONT> for (int j = startColumn; j <= endColumn; ++j) {<a name="line.507"></a> <FONT color="green">508</FONT> rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.508"></a> <FONT color="green">509</FONT> }<a name="line.509"></a> <FONT color="green">510</FONT> }<a name="line.510"></a> <FONT color="green">511</FONT> return visitor.end();<a name="line.511"></a> <FONT color="green">512</FONT> }<a name="line.512"></a> <FONT color="green">513</FONT> <a name="line.513"></a> <FONT color="green">514</FONT> /** {@inheritDoc} */<a name="line.514"></a> <FONT color="green">515</FONT> @Override<a name="line.515"></a> <FONT color="green">516</FONT> public double walkInRowOrder(final RealMatrixPreservingVisitor visitor,<a name="line.516"></a> <FONT color="green">517</FONT> final int startRow, final int endRow,<a name="line.517"></a> <FONT color="green">518</FONT> final int startColumn, final int endColumn)<a name="line.518"></a> <FONT color="green">519</FONT> throws MatrixIndexException, MatrixVisitorException {<a name="line.519"></a> <FONT color="green">520</FONT> MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.520"></a> <FONT color="green">521</FONT> visitor.start(getRowDimension(), getColumnDimension(),<a name="line.521"></a> <FONT color="green">522</FONT> startRow, endRow, startColumn, endColumn);<a name="line.522"></a> <FONT color="green">523</FONT> for (int i = startRow; i <= endRow; ++i) {<a name="line.523"></a> <FONT color="green">524</FONT> final double[] rowI = data[i];<a name="line.524"></a> <FONT color="green">525</FONT> for (int j = startColumn; j <= endColumn; ++j) {<a name="line.525"></a> <FONT color="green">526</FONT> visitor.visit(i, j, rowI[j]);<a name="line.526"></a> <FONT color="green">527</FONT> }<a name="line.527"></a> <FONT color="green">528</FONT> }<a name="line.528"></a> <FONT color="green">529</FONT> return visitor.end();<a name="line.529"></a> <FONT color="green">530</FONT> }<a name="line.530"></a> <FONT color="green">531</FONT> <a name="line.531"></a> <FONT color="green">532</FONT> /** {@inheritDoc} */<a name="line.532"></a> <FONT color="green">533</FONT> @Override<a name="line.533"></a> <FONT color="green">534</FONT> public double walkInColumnOrder(final RealMatrixChangingVisitor visitor)<a name="line.534"></a> <FONT color="green">535</FONT> throws MatrixVisitorException {<a name="line.535"></a> <FONT color="green">536</FONT> final int rows = getRowDimension();<a name="line.536"></a> <FONT color="green">537</FONT> final int columns = getColumnDimension();<a name="line.537"></a> <FONT color="green">538</FONT> visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.538"></a> <FONT color="green">539</FONT> for (int j = 0; j < columns; ++j) {<a name="line.539"></a> <FONT color="green">540</FONT> for (int i = 0; i < rows; ++i) {<a name="line.540"></a> <FONT color="green">541</FONT> final double[] rowI = data[i];<a name="line.541"></a> <FONT color="green">542</FONT> rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.542"></a> <FONT color="green">543</FONT> }<a name="line.543"></a> <FONT color="green">544</FONT> }<a name="line.544"></a> <FONT color="green">545</FONT> return visitor.end();<a name="line.545"></a> <FONT color="green">546</FONT> }<a name="line.546"></a> <FONT color="green">547</FONT> <a name="line.547"></a> <FONT color="green">548</FONT> /** {@inheritDoc} */<a name="line.548"></a> <FONT color="green">549</FONT> @Override<a name="line.549"></a> <FONT color="green">550</FONT> public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor)<a name="line.550"></a> <FONT color="green">551</FONT> throws MatrixVisitorException {<a name="line.551"></a> <FONT color="green">552</FONT> final int rows = getRowDimension();<a name="line.552"></a> <FONT color="green">553</FONT> final int columns = getColumnDimension();<a name="line.553"></a> <FONT color="green">554</FONT> visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.554"></a> <FONT color="green">555</FONT> for (int j = 0; j < columns; ++j) {<a name="line.555"></a> <FONT color="green">556</FONT> for (int i = 0; i < rows; ++i) {<a name="line.556"></a> <FONT color="green">557</FONT> visitor.visit(i, j, data[i][j]);<a name="line.557"></a> <FONT color="green">558</FONT> }<a name="line.558"></a> <FONT color="green">559</FONT> }<a name="line.559"></a> <FONT color="green">560</FONT> return visitor.end();<a name="line.560"></a> <FONT color="green">561</FONT> }<a name="line.561"></a> <FONT color="green">562</FONT> <a name="line.562"></a> <FONT color="green">563</FONT> /** {@inheritDoc} */<a name="line.563"></a> <FONT color="green">564</FONT> @Override<a name="line.564"></a> <FONT color="green">565</FONT> public double walkInColumnOrder(final RealMatrixChangingVisitor visitor,<a name="line.565"></a> <FONT color="green">566</FONT> final int startRow, final int endRow,<a name="line.566"></a> <FONT color="green">567</FONT> final int startColumn, final int endColumn)<a name="line.567"></a> <FONT color="green">568</FONT> throws MatrixIndexException, MatrixVisitorException {<a name="line.568"></a> <FONT color="green">569</FONT> MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.569"></a> <FONT color="green">570</FONT> visitor.start(getRowDimension(), getColumnDimension(),<a name="line.570"></a> <FONT color="green">571</FONT> startRow, endRow, startColumn, endColumn);<a name="line.571"></a> <FONT color="green">572</FONT> for (int j = startColumn; j <= endColumn; ++j) {<a name="line.572"></a> <FONT color="green">573</FONT> for (int i = startRow; i <= endRow; ++i) {<a name="line.573"></a> <FONT color="green">574</FONT> final double[] rowI = data[i];<a name="line.574"></a> <FONT color="green">575</FONT> rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.575"></a> <FONT color="green">576</FONT> }<a name="line.576"></a> <FONT color="green">577</FONT> }<a name="line.577"></a> <FONT color="green">578</FONT> return visitor.end();<a name="line.578"></a> <FONT color="green">579</FONT> }<a name="line.579"></a> <FONT color="green">580</FONT> <a name="line.580"></a> <FONT color="green">581</FONT> /** {@inheritDoc} */<a name="line.581"></a> <FONT color="green">582</FONT> @Override<a name="line.582"></a> <FONT color="green">583</FONT> public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor,<a name="line.583"></a> <FONT color="green">584</FONT> final int startRow, final int endRow,<a name="line.584"></a> <FONT color="green">585</FONT> final int startColumn, final int endColumn)<a name="line.585"></a> <FONT color="green">586</FONT> throws MatrixIndexException, MatrixVisitorException {<a name="line.586"></a> <FONT color="green">587</FONT> MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.587"></a> <FONT color="green">588</FONT> visitor.start(getRowDimension(), getColumnDimension(),<a name="line.588"></a> <FONT color="green">589</FONT> startRow, endRow, startColumn, endColumn);<a name="line.589"></a> <FONT color="green">590</FONT> for (int j = startColumn; j <= endColumn; ++j) {<a name="line.590"></a> <FONT color="green">591</FONT> for (int i = startRow; i <= endRow; ++i) {<a name="line.591"></a> <FONT color="green">592</FONT> visitor.visit(i, j, data[i][j]);<a name="line.592"></a> <FONT color="green">593</FONT> }<a name="line.593"></a> <FONT color="green">594</FONT> }<a name="line.594"></a> <FONT color="green">595</FONT> return visitor.end();<a name="line.595"></a> <FONT color="green">596</FONT> }<a name="line.596"></a> <FONT color="green">597</FONT> <a name="line.597"></a> <FONT color="green">598</FONT> /**<a name="line.598"></a> <FONT color="green">599</FONT> * Returns a fresh copy of the underlying data array.<a name="line.599"></a> <FONT color="green">600</FONT> *<a name="line.600"></a> <FONT color="green">601</FONT> * @return a copy of the underlying data array.<a name="line.601"></a> <FONT color="green">602</FONT> */<a name="line.602"></a> <FONT color="green">603</FONT> private double[][] copyOut() {<a name="line.603"></a> <FONT color="green">604</FONT> final int nRows = this.getRowDimension();<a name="line.604"></a> <FONT color="green">605</FONT> final double[][] out = new double[nRows][this.getColumnDimension()];<a name="line.605"></a> <FONT color="green">606</FONT> // can't copy 2-d array in one shot, otherwise get row references<a name="line.606"></a> <FONT color="green">607</FONT> for (int i = 0; i < nRows; i++) {<a name="line.607"></a> <FONT color="green">608</FONT> System.arraycopy(data[i], 0, out[i], 0, data[i].length);<a name="line.608"></a> <FONT color="green">609</FONT> }<a name="line.609"></a> <FONT color="green">610</FONT> return out;<a name="line.610"></a> <FONT color="green">611</FONT> }<a name="line.611"></a> <FONT color="green">612</FONT> <a name="line.612"></a> <FONT color="green">613</FONT> /**<a name="line.613"></a> <FONT color="green">614</FONT> * Replaces data with a fresh copy of the input array.<a name="line.614"></a> <FONT color="green">615</FONT> * <p><a name="line.615"></a> <FONT color="green">616</FONT> * Verifies that the input array is rectangular and non-empty.</p><a name="line.616"></a> <FONT color="green">617</FONT> *<a name="line.617"></a> <FONT color="green">618</FONT> * @param in data to copy in<a name="line.618"></a> <FONT color="green">619</FONT> * @throws IllegalArgumentException if input array is empty or not<a name="line.619"></a> <FONT color="green">620</FONT> * rectangular<a name="line.620"></a> <FONT color="green">621</FONT> * @throws NullPointerException if input array is null<a name="line.621"></a> <FONT color="green">622</FONT> */<a name="line.622"></a> <FONT color="green">623</FONT> private void copyIn(final double[][] in) {<a name="line.623"></a> <FONT color="green">624</FONT> setSubMatrix(in, 0, 0);<a name="line.624"></a> <FONT color="green">625</FONT> }<a name="line.625"></a> <FONT color="green">626</FONT> <a name="line.626"></a> <FONT color="green">627</FONT> }<a name="line.627"></a> </PRE> </BODY> </HTML>