/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.ma2;
import junit.framework.*;
public class TestMAMatrix extends TestCase {
public TestMAMatrix(String name) {
super(name);
}
private int n = 5, m = 10;
public void testDot() {
System.out.println("testMatrixDot");
MAVector v1 = new MAVector(n);
for (int i=0; i<n; i++) {
v1.setDouble(i, 1.0);
}
MAMatrix M = new MAMatrix(m,n);
for (int i=0; i<m; i++) {
for (int j=0; j<n; j++) {
M.setDouble(i, j, 1.0);
}
}
MAVector v2 = M.dot( v1);
assert( tolerance( v2.norm() - Math.sqrt(m*n*n)) );
}
public void testMultiply() {
System.out.println("testMatrixMultiply");
MAMatrix M1 = new MAMatrix(2,3);
MAMatrix M2 = new MAMatrix(3,2);
for (int i=0; i<2; i++) {
for (int j=0; j<3; j++) {
M1.setDouble(i, j, (double) i+1);
M2.setDouble(j, i, (double) i+1);
}
}
MAMatrix r = MAMatrix.multiply( M1, M2);
assert( tolerance( r.getDouble(0,0) - 3.0) );
assert( tolerance( r.getDouble(0,1) - 6.0) );
assert( tolerance( r.getDouble(1,0) - 6.0) );
assert( tolerance( r.getDouble(1,1) - 12.0) );
}
public void testTranspose() {
System.out.println("testMatrixTranspose");
MAMatrix M1 = new MAMatrix(2,3);
MAMatrix M2 = new MAMatrix(3,2);
for (int i=0; i<2; i++) {
for (int j=0; j<3; j++) {
M1.setDouble(i, j, (double) i+j);
M2.setDouble(j, i, (double) i+j);
}
}
MAMatrix t = M2.transpose();
assert( tolerance( t.getDouble(0,0) - M1.getDouble(0,0)) );
assert( tolerance( t.getDouble(0,1) - M1.getDouble(0,1)) );
assert( tolerance( t.getDouble(0,2) - M1.getDouble(0,2)) );
assert( tolerance( t.getDouble(1,0) - M1.getDouble(1,0)) );
assert( tolerance( t.getDouble(1,1) - M1.getDouble(1,1)) );
assert( tolerance( t.getDouble(1,2) - M1.getDouble(1,2)) );
}
public void testDiag() {
System.out.println("testMatrixMultiplyDiagonal");
MAMatrix M1 = new MAMatrix(2,3);
for (int i=0; i<2; i++) {
for (int j=0; j<3; j++) {
M1.setDouble(i, j, i+j+1.0);
}
}
MAVector v1 = new MAVector(3);
for (int i=0; i<3; i++) {
v1.setDouble(i, i+1.0);
}
M1.postMultiplyDiagonal(v1);
assert( tolerance( 1.0 - M1.getDouble(0,0)) );
assert( tolerance( 4.0 - M1.getDouble(0,1)) );
assert( tolerance( 9.0 - M1.getDouble(0,2)) );
assert( tolerance( 2.0 - M1.getDouble(1,0)) );
assert( tolerance( 6.0 - M1.getDouble(1,1)) );
assert( tolerance( 12.0 - M1.getDouble(1,2)) );
MAVector v2 = new MAVector(2);
for (int i=0; i<2; i++) {
v2.setDouble(i, i+2.0);
}
M1.preMultiplyDiagonal(v2);
assert( tolerance( 2.0 - M1.getDouble(0,0)) );
assert( tolerance( 8.0 - M1.getDouble(0,1)) );
assert( tolerance( 18.0 - M1.getDouble(0,2)) );
assert( tolerance( 6.0 - M1.getDouble(1,0)) );
assert( tolerance( 18.0 - M1.getDouble(1,1)) );
assert( tolerance( 36.0 - M1.getDouble(1,2)) );
try {
M1.preMultiplyDiagonal(v1);
assert(false);
} catch (IllegalArgumentException e) {;}
try {
M1.postMultiplyDiagonal(v2);
assert(false);
} catch (IllegalArgumentException e) {;}
}
public void testProjection() {
System.out.println("testMatrixProjection");
MAMatrix M1 = new MAMatrix(2,3);
for (int i=0; i<2; i++) {
for (int j=0; j<3; j++) {
M1.setDouble(i, j, i+j+1.0);
}
}
MAVector v1 = M1.row(1);
assert( tolerance( 2.0 - v1.getDouble(0)) );
assert( tolerance( 3.0 - v1.getDouble(1)) );
assert( tolerance( 4.0 - v1.getDouble(2)) );
MAVector v2 = M1.column(2);
assert( tolerance( 3.0 - v2.getDouble(0)) );
assert( tolerance( 4.0 - v2.getDouble(1)) );
}
private boolean tolerance( double val) {
return Math.abs(val) < 1.0e-10;
}
}