obspy.signal.interpolation.calculate_lanczos_kernel¶

calculate_lanczos_kernel(x, a, window)[source]¶

Helper function to get the actually used kernel for a specific value of a. Useful to analyse the behaviour of different tapers and different values of a.

Parameters:	x (`numpy.ndarray`) The x values at which to calculate the kernel. a (int) The width of the window in samples on either side. window (str) The window used to multiply the sinc function with. One of `"lanczos"`, `"hanning"`, `"blackman"`.

Returns a dictionary of arrays:

"full_kernel": The tapered sinc function evaluated at samples x.
"only_sinc": The sinc function evaluated at samples x.
"only_taper": The taper function evaluated at samples x.