31 lines
833 B
Java
31 lines
833 B
Java
import java.util.Locale;
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import org.apache.commons.math3.linear.Array2DRowRealMatrix;
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import org.apache.commons.math3.linear.QRDecomposition;
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import org.apache.commons.math3.linear.RealMatrix;
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public class Decompose {
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public static void main(String[] args) {
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var a = new Array2DRowRealMatrix(new double[][] {
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{12, -51, 4},
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{ 6, 167, -68},
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{-4, 24, -41}
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});
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var qr = new QRDecomposition(a);
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print(qr.getQ());
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System.out.println();
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print(qr.getR());
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}
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public static void print(RealMatrix a) {
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for (double[] u: a.getData()) {
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System.out.print("[ ");
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for (double x: u) {
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System.out.printf(Locale.ROOT, "%10.4f ", x);
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}
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System.out.println("]");
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}
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}
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}
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