SciPy

scipy.signal.bspline gives zero output for integer types. This also affects quadratic and cubic.

Reproducing code example:

An example of an incorrect result

>>> from scipy.signal import bspline, quadratic, cubic
>>> bspline(np.array([-3,-2,-1,0,1,2,3]), 6)
array([0, 0, 0, 0, 0, 0, 0])

What was expected

>>> bspline(np.array([-3,-2,-1,0,1,2,3]).astype(float), 6)
array

Description of the desired feature

The spacing parameter of the rolling_window function controls the distance between the center of two adjacent windows.
Nevertheless, the docstring reads:

    spacing : float, tuple = (s_north, s_east), or None
        The window size in the South-North and West-East directions,
        respectively. A single value means that the size is equal