public void testDenseSparseMmul() {
int K = 60;
int N = thousandconstant;
DenseMatrix A = DenseMatrix.rand(K, N);
SparseMatrixLil B = SparseMatrixLil.rand(N, K);
Timer timer = new Timer();
DenseMatrix C = A.mmul(B);
timer.printTimeCheckMilliseconds();
DenseMatrix C2 = A.mmul(B.toDense());
assertTrue(C.equals(C2));
}
public void testMultBasic() {
DenseMatrix A = new DenseMatrix(new double[][] {{3, 4}, {5, 6}, {3, 9}});
DenseMatrix B = new DenseMatrix(new double[][] {{2, 9, 1, 2}, {4, 1, 3, 2}});
DenseMatrix C = A.mmul(B);
System.out.println(C);
DenseMatrix Ccorrect =
new DenseMatrix(new double[][] {{22, 31, 15, 14}, {34, 51, 23, 22}, {42, 36, 30, 24}});
assertTrue(C.equals(Ccorrect));
}
public void testldltsolve() {
int K = thousandconstant;
DenseMatrix A_ = rand(K, K);
DenseMatrix A = A_.t().mmul(A_);
DenseMatrix B = rand(K, K);
Timer timer = new Timer();
DenseMatrix X = A.ldltSolve(B);
timer.printTimeCheckMilliseconds();
assertTrue(A.mmul(X).equals(B));
}
public void testfullpivhouseholderqrsolve() {
int K = thousandconstant;
DenseMatrix A = rand(K, K / 2);
DenseMatrix B = rand(K, K / 3);
Timer timer = new Timer();
DenseMatrix X = A.fullPivHouseholderQRSolve(B);
timer.printTimeCheckMilliseconds();
DenseMatrix AX = A.mmul(X);
double diff = AX.sub(B).abs().sum().s();
assertTrue(diff < 0.01 * K * K / 3);
}
public void testOne() {
DenseMatrix A = ones(3, 3);
System.out.println(A);
DenseMatrix B = ones(3, 3);
System.out.println(B);
DenseMatrix C = A.mmul(B);
System.out.println(C);
assertEquals(3.0, C.get(0, 0));
assertEquals(3.0, C.get(0, 2));
assertEquals(3.0, C.get(2, 0));
assertEquals(3.0, C.get(2, 2));
}