@Test
public void testMmul() {
IComplexNDArray n = Nd4j.createComplex(Nd4j.linspace(1, 10, 10));
IComplexNDArray transposed = n.transpose();
assertEquals(true, n.isRowVector());
assertEquals(true, transposed.isColumnVector());
INDArray innerProduct = n.mmul(transposed);
INDArray scalar = Nd4j.scalar(Nd4j.createComplexNumber(385, 0));
assertEquals(getFailureMessage(), scalar, innerProduct);
INDArray outerProduct = transposed.mmul(n);
assertEquals(true, Shape.shapeEquals(new int[] {10, 10}, outerProduct.shape()));
IComplexNDArray d3 =
Nd4j.createComplex(ComplexUtil.complexNumbersFor(new double[] {1, 2})).reshape(2, 1);
IComplexNDArray d4 = Nd4j.createComplex(ComplexUtil.complexNumbersFor(new double[] {3, 4}));
INDArray resultNDArray = d3.mmul(d4);
INDArray result =
Nd4j.createComplex(
new IComplexNumber[][] {
{Nd4j.createComplexNumber(3, 0), Nd4j.createComplexNumber(4, 0)},
{Nd4j.createComplexNumber(6, 0), Nd4j.createComplexNumber(8, 0)}
});
assertEquals(getFailureMessage(), result, resultNDArray);
}
@Test
public void testMmulColumnVector() {
IComplexNDArray three =
Nd4j.createComplex(ComplexUtil.complexNumbersFor(new double[] {4, 19}), new int[] {1, 2});
IComplexNDArray test = Nd4j.complexLinSpace(1, 30, 30).reshape(3, 5, 2);
IComplexNDArray sliceRow = test.slice(0).getRow(1);
assertEquals(three, sliceRow);
IComplexNDArray twoSix =
Nd4j.createComplex(ComplexUtil.complexNumbersFor(new double[] {2, 6}), new int[] {2, 1});
IComplexNDArray threeTwoSix = three.mmul(twoSix);
IComplexNDArray sliceRowTwoSix = sliceRow.mmul(twoSix);
assertEquals(getFailureMessage(), threeTwoSix, sliceRowTwoSix);
}
@Test
public void testTwoByTwoMmul() {
IComplexNDArray oneThroughFour = Nd4j.createComplex(Nd4j.linspace(1, 4, 4).reshape(2, 2));
IComplexNDArray fiveThroughEight = Nd4j.createComplex(Nd4j.linspace(5, 8, 4).reshape(2, 2));
IComplexNDArray solution = Nd4j.createComplex(Nd4j.create(new double[][] {{23, 31}, {34, 46}}));
IComplexNDArray test = oneThroughFour.mmul(fiveThroughEight);
assertEquals(getFailureMessage(), solution, test);
}