01 /*
02 * $Id: LeftDivideSample4.java,v 1.7 2008/02/02 03:06:27 koga Exp $
03 *
04 * Copyright (C) 2004 Koga Laboratory. All rights reserved.
05 *
06 */
07 package matxbook.chap08;
08
09 import org.mklab.nfc.matrix.DoubleMatrix;
10
11
12 /**
13 * @author koga
14 * @version $Revision: 1.7 $, 2004/04/15
15 */
16 public class LeftDivideSample4 {
17
18 /**
19 * メインメソッド
20 *
21 * @param args コマンドライン引数
22 */
23 @SuppressWarnings("nls")
24 public static void main(String[] args) {
25 DoubleMatrix a = new DoubleMatrix(new double[][] { {1, 2, 3}, {4, 5, 6}, {7, 8, 9}, {10, 11, 12}});
26 DoubleMatrix b = new DoubleMatrix(new double[] {1, 3, 5, 7}).transpose();
27 DoubleMatrix[] qr = a.qrDecompose();
28 DoubleMatrix q = qr[0];
29 DoubleMatrix r = qr[1];
30 DoubleMatrix y = q.transpose().multiply(b);
31 DoubleMatrix x = r.leftDivide(y);
32 x.print("x");
33 }
34 }
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