public void LinqError(NdArray <double> x, NdArray <double> y)
{
Assert.Throws <ShapeMismatchException>(() => NdLinAlg.Cross(x, y));
}
public void LinqSuccessful(NdArray <double> x, NdArray <double> y,
NdArray <double> answer)
{
Assert.Equal(answer, NdLinAlg.Cross(x, y));
}