01 /*
02 * $Id: BooleanMatrixFindSample3.java,v 1.8 2008/02/02 03:06:25 koga Exp $
03 *
04 * Copyright (C) 2004 Koga Laboratory. All rights reserved.
05 *
06 */
07 package matxbook.chap06;
08
09 import org.mklab.nfc.matrix.DoubleMatrix;
10 import org.mklab.nfc.matrix.IntMatrix;
11
12
13 /**
14 * @author koga
15 * @version $Revision: 1.8 $, 2004/04/14
16 */
17 public class BooleanMatrixFindSample3 {
18
19 /**
20 * メインメソッド
21 *
22 * @param args コマンドライン引数
23 */
24 @SuppressWarnings("nls")
25 public static void main(String[] args) {
26 DoubleMatrix a = new DoubleMatrix(new double[] {-1, 1, -2, 2});
27 IntMatrix index = a.compareElementWise(".<", 0).find();
28 DoubleMatrix b = a.getSubVector(index);
29 a.setSubVector(index, b.unaryMinus());
30 a.print("a(a .< 0) = - a(a .< 0)");
31 }
32 }
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