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/*
* Copyright (c) 2009-2017, Peter Abeles. All Rights Reserved.
*
* This file is part of Efficient Java Matrix Library (EJML).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.ejml.data;
import org.ejml.UtilEjml;
import java.util.Arrays;
import java.util.Random;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
/**
* Contains functions useful for testing the results of matrices
*
* @author Peter Abeles
*/
public class UtilTestMatrix {
public static void checkMat(DMatrixRMaj mat , double ...d )
{
double data[] = mat.getData();
for( int i = 0; i < mat.getNumElements(); i++ ) {
assertEquals(d[i],data[i], UtilEjml.TEST_F64);
}
}
public static void checkMat(FMatrixRMaj mat , float ...d )
{
float data[] = mat.getData();
for( int i = 0; i < mat.getNumElements(); i++ ) {
assertEquals(d[i],data[i],UtilEjml.TEST_F32);
}
}
public static void checkSameElements( double tol, int length , double a[], double b[] )
{
double aa[] = new double[ length ];
double bb[] = new double[ length ];
System.arraycopy(a,0,aa,0,length);
System.arraycopy(b,0,bb,0,length);
Arrays.sort(aa);
Arrays.sort(bb);
for( int i = 0; i < length; i++ ) {
if( Math.abs(aa[i]-bb[i])> tol )
fail("Mismatched elements");
}
}
public static void checkSameElements( float tol, int length , float a[], float b[] )
{
float aa[] = new float[ length ];
float bb[] = new float[ length ];
System.arraycopy(a,0,aa,0,length);
System.arraycopy(b,0,bb,0,length);
Arrays.sort(aa);
Arrays.sort(bb);
for( int i = 0; i < length; i++ ) {
if( Math.abs(aa[i]-bb[i]) > tol )
fail("Mismatched elements");
}
}
public static void checkNumFound( int expected , double tol , double value , double data[] )
{
int numFound = 0;
for( int i = 0; i < data.length; i++ ) {
if( Math.abs(data[i]-value) <= tol )
numFound++;
}
assertEquals(expected,numFound);
}
public static void checkNumFound( int expected , float tol , float value , float data[] )
{
int numFound = 0;
for( int i = 0; i < data.length; i++ ) {
if( Math.abs(data[i]-value) <= tol )
numFound++;
}
assertEquals(expected,numFound);
}
/**
* <p>
* Sets each element in the matrix to a value drawn from an uniform distribution from 'min' to 'max' inclusive.
* </p>
*
* @param min The minimum value each element can be.
* @param max The maximum value each element can be.
* @param rand Random number generator used to fill the matrix.
*/
public static DMatrixRMaj random64(int numRows , int numCols , double min , double max , Random rand )
{
DMatrixRMaj mat = new DMatrixRMaj(numRows,numCols);
double d[] = mat.getData();
int size = mat.getNumElements();
double r = max-min;
for( int i = 0; i < size; i++ ) {
d[i] = r*rand.nextDouble()+min;
}
return mat;
}
/**
* <p>
* Sets each element in the matrix to a value drawn from an uniform distribution from 'min' to 'max' inclusive.
* </p>
*
* @param min The minimum value each element can be.
* @param max The maximum value each element can be.
* @param rand Random number generator used to fill the matrix.
*/
public static FMatrixRMaj random32(int numRows , int numCols , float min , float max , Random rand )
{
FMatrixRMaj mat = new FMatrixRMaj(numRows,numCols);
float d[] = mat.getData();
int size = mat.getNumElements();
float r = max-min;
for( int i = 0; i < size; i++ ) {
d[i] = r*rand.nextFloat()+min;
}
return mat;
}
}
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