package com.nr.test.test_chapter2;
import static com.nr.NRUtil.*;
import static com.nr.test.NRTestUtil.*;
import static org.junit.Assert.fail;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.nr.la.Cholesky;
public class Test_Cholesky {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void test() {
double sbeps, diag=10.0;
double[][] a = new double[50][50];
double[] r=new double[50],y=new double[50];
boolean localflag, globalflag=false;
ranmat(a,diag);
ranvec(r);
// Test cholesky
System.out.println("Testing cholesky");
double[][] aposdef = matmul(a,transpose(a));
Cholesky ach = new Cholesky(aposdef);
ach.solve(r,y);
sbeps = 5.e-15;
localflag = maxel(vecsub(matmul(aposdef,y),r)) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** cholesky: Error in solve() method");
}
ranvec(y);
double[] yy = new double[y.length];
ach.elmult(y,r);
ach.elsolve(r,yy);
sbeps = 5.e-15;
localflag = maxel(vecsub(y,yy)) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** cholesky: Error in method elmult() or elsolve()");
}
double[][] ainv = buildMatrix(a);
ach.inverse(ainv);
sbeps = 5.e-15;
localflag = maxel(matsub(matmul(ainv,aposdef),ident(aposdef.length,1.))) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** cholesky: Error in method inverse()");
}
if (globalflag) System.out.println("Failed\n");
else System.out.println("Passed\n");
}
}