gaussian_filter – SPECTRUM

public pure function gaussian_filter(x, alpha, k) result(rst)

Applies a Gaussian filter to a signal.

Type	Intent		Name
real(kind=real64),	intent(in)	::	x(:)	An N-element array containing the signal to filter.
real(kind=real64),	intent(in)	::	alpha	A parameter that specifies the number of standard deviations $\sigma$ desired in the kernel. This parameter is related to the standard deviation by $\sigma = \frac{k - 1}{2 \alpha}$ .
integer(kind=int32),	intent(in)	::	k	The kernel size. This value must be a positive, non-zero integer value less than N.

An N-element array containing the filtered signal.