numpy function input issues

[joakimsk]

I had issues running this with python 3.11 and numpy 1.25.0. Seems that the functions need integers but get floats due to multiplication with float. Can be fixed by casting the whole result to integer.

Line 124: stretchedGrid = np.empty((0, int(len(npGrid) * isoStretchFactor)))
Fixed: stretchedGrid = np.empty((0, int(len(npGrid * isoStretchFactor))))

Line 126: y = np.linspace(0, len(column), len(column) * isoStretchFactor) #the required samples
Fixed: y = np.linspace(0, len(column), len(column * isoStretchFactor)) #the required samples