Moving average or running mean

Question

Is there a SciPy function or NumPy function or module for Python that calculates the running mean of a 1D array given a specific window?

Answer 1

How about a moving average filter? It is also a one-liner and has the advantage, that you can easily manipulate the window type if you need something else than the rectangle, ie. a N-long simple moving average of an array a:

lfilter(np.ones(N)/N, [1], a)[N:]

And with the triangular window applied:

lfilter(np.ones(N)*scipy.signal.triang(N)/N, [1], a)[N:]

Note: I usually discard the first N samples as bogus hence [N:] at the end, but it is not necessary and the matter of a personal choice only.