@Test
  public void testVectorInit() {
    DataBuffer data = Nd4j.linspace(1, 4, 4).data();
    IComplexNDArray arr = Nd4j.createComplex(data, new int[] {4});
    assertEquals(true, arr.isRowVector());
    IComplexNDArray arr2 = Nd4j.createComplex(data, new int[] {1, 4});
    assertEquals(true, arr2.isRowVector());

    IComplexNDArray columnVector = Nd4j.createComplex(data, new int[] {4, 1});
    assertEquals(true, columnVector.isColumnVector());
  }
  @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);
  }