vona.math

Class TestSVD

java.lang.Object

vona.math.TestSVD

public class TestSVD
extends java.lang.Object

SVD wrapper test

Copyright (C) 2008 Marsette A. Vona, III

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

Author:

Marsette (Marty) A. Vona, III

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static double	CHECK_EPS
(package private) static double	S_EPS

Constructor Summary

Constructors

Constructor and Description
TestSVD()

Method Summary

Methods

Modifier and Type	Method and Description
protected static boolean	checkSVD(int m, int n, double[] a, double[] s, double[] u, double[] vt) Check that a is VonaMath.relativeEquals(double, double, double) u*s*vt up to CHECK_EPS.
protected static void	clampColRank(double[] a, int m, int n, int cr, double s) Clamp the column rank of a to at most cr.
protected static void	clampRank(double[] a, int m, int n, int cr, double s) Clamp the rank of a to at most cr.
protected static void	clampRowRank(double[] a, int m, int n, int cr, double s) Clamp the row rank of a to at most cr.
protected static double[]	consRandom(int m, int n) cons a random-valued mxn matrix
static void	main(java.lang.String[] arg) entry point
protected static void	makeDependentCol(double[] a, int m, int n, int dc, int[] oc, int ocStart, double slop) Rewrite column dc of a as a random linear combination of columns oc[ocStart to oc.length].
protected static void	makeDependentRow(double[] a, int m, int n, int dr, int[] or, int orStart, double slop) Rewrite row dr of a as a random linear combination of rows or[orStart to or.length].
protected static void	shuffle(int[] a) randomly shuffle a
protected static void	swap(int[] a, int i, int j) swap elements i and j

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

S_EPS

static final double S_EPS

See Also:

Constant Field Values

CHECK_EPS

static final double CHECK_EPS

See Also:

Constant Field Values

Constructor Detail

TestSVD

public TestSVD()

Method Detail

main

public static void main(java.lang.String[] arg)

entry point

consRandom

protected static double[] consRandom(int m,
                  int n)

cons a random-valued mxn matrix

clampRank

protected static void clampRank(double[] a,
             int m,
             int n,
             int cr,
             double s)

Clamp the rank of a to at most cr.

clampRowRank

protected static void clampRowRank(double[] a,
                int m,
                int n,
                int cr,
                double s)

Clamp the row rank of a to at most cr.

clampColRank

protected static void clampColRank(double[] a,
                int m,
                int n,
                int cr,
                double s)

Clamp the column rank of a to at most cr.

shuffle

protected static void shuffle(int[] a)

randomly shuffle a

swap

protected static void swap(int[] a,
        int i,
        int j)

swap elements i and j

makeDependentRow

protected static void makeDependentRow(double[] a,
                    int m,
                    int n,
                    int dr,
                    int[] or,
                    int orStart,
                    double slop)

Rewrite row dr of a as a random linear combination of rows or[orStart to or.length].

makeDependentCol

protected static void makeDependentCol(double[] a,
                    int m,
                    int n,
                    int dc,
                    int[] oc,
                    int ocStart,
                    double slop)

Rewrite column dc of a as a random linear combination of columns oc[ocStart to oc.length].

checkSVD

protected static boolean checkSVD(int m,
               int n,
               double[] a,
               double[] s,
               double[] u,
               double[] vt)

Check that a is VonaMath.relativeEquals(double, double, double) u*s*vt up to CHECK_EPS.