QR decomposition: Difference between revisions

Line 1,930:

=={{header|Java}}==

=== Jama ===

Using the [https://math.nist.gov/javanumerics/jama/ Jama] library.

Using the [https://math.nist.gov/javanumerics/jama/ Jama] library. Compile with: '''javac -cp Jama-1.0.3.jar Decompose.java'''.

⚫

Compile with: '''javac -cp ~~Jama~~-1.0.3.jar Decompose.java'''.

<lang java>import Jama.Matrix;

Line 1,963:

Line 1,961:

=== Colt ===

Using the [https://dst.lbl.gov/ACSSoftware/colt/ Colt] library.

Using the [https://dst.lbl.gov/ACSSoftware/colt/ Colt] library. Compile with: '''javac -cp colt.jar Decompose.java'''.

Compile with: '''javac -cp colt.jar Decompose.java'''.

<lang java>import cern.colt.matrix.impl.DenseDoubleMatrix2D;

Line 1,972:

Line 1,968:

public class Decompose {

public static void main(String[] args) {

var a = new DenseDoubleMatrix2D(new double[][] {~~{12, -51, 4},~~

var a = new DenseDoubleMatrix2D(new double[][] {

{ 6, ~~167~~, ~~-68~~},

{12, -51, 4},

~~{-4~~, 24, -41}~~});~~

{ 6, 167, -68},

{-4, 24, -41}

});

var qr = new QRDecomposition(a);

System.out.println(qr.getQ());

Line 2,008:

Line 2,006:

public class Decompose {

public static void main(String[] args) {

var a = new Array2DRowRealMatrix(new double[][] {~~{12, -51, 4},~~

var a = new Array2DRowRealMatrix(new double[][] {

{ 6, ~~167~~, ~~-68~~},

{12, -51, 4},

~~{-4~~, 24, -41}~~});~~

{ 6, 167, -68},

{-4, 24, -41}

});

var qr = new QRDecomposition(a);

Line 2,038:

[ 0.0000 -175.0000 70.0000 ]

[ 0.0000 0.0000 35.0000 ]</pre>

=== la4j ===

⚫

Using the [http://la4j.org/ la4j] library. Compile with: '''javac -cp la4j-0.6.0.jar Decompose.java'''.

<lang java>import org.la4j.Matrix;

import org.la4j.decomposition.QRDecompositor;

public class Decompose {

public static void main(String[] args) {

var a = Matrix.from2DArray(new double[][] {

{12, -51, 4},

{ 6, 167, -68},

{-4, 24, -41},

});

Matrix[] qr = new QRDecompositor(a).decompose();

System.out.println(qr[0]);

System.out.println(qr[1]);

}

}</lang>

<pre>-0,857 0,394 -0,331

-0,429 -0,903 0,034

0,286 -0,171 -0,943

-14,000 -21,000 14,000

0,000 -175,000 70,000

0,000 0,000 35,000</pre>

=={{header|Julia}}==