public void testMatrixMultiply() throws Throwable {
double a[][] = {
{1, 0, 2},
{-1, 3, 1}
};
double b[][] = {
{3, 1},
{2, 1},
{1, 0}
};
double c[][] = {
{5, 1},
{4, 2}
};
Matrix matrixA = new Matrix(a);
Matrix matrixB = new Matrix(b);
Matrix matrixC = new Matrix(c);
Matrix result = matrixA.clone();
result = MatrixMath.multiply(matrixA, matrixB);
TestCase.assertTrue(result.equals(matrixC));
double a2[][] = {
{1, 2, 3, 4},
{5, 6, 7, 8}
};
double b2[][] = {
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
{10, 11, 12}
};
double c2[][] = {
{70, 80, 90},
{158, 184, 210}
};
matrixA = new Matrix(a2);
matrixB = new Matrix(b2);
matrixC = new Matrix(c2);
result = MatrixMath.multiply(matrixA, matrixB);
TestCase.assertTrue(result.equals(matrixC));
result = matrixB.clone();
try {
MatrixMath.multiply(matrixB, matrixA);
TestCase.assertTrue(false);
} catch (MatrixError e) {
}
}
public void testVectorLength() throws Throwable {
double vectorData[] = {1.0, 2.0, 3.0, 4.0};
Matrix vector = Matrix.createRowMatrix(vectorData);
TestCase.assertEquals(5, (int) MatrixMath.vectorLength(vector));
Matrix nonVector = new Matrix(2, 2);
try {
MatrixMath.vectorLength(nonVector);
TestCase.assertTrue(false);
} catch (MatrixError e) {
}
}