This is documentation for an old release of SciPy (version 0.9.0). Read this page Search for this page in the documentation of the latest stable release (version 1.15.1).

scipy.signal.decimate¶

scipy.signal.decimate(x, q, n=None, ftype='iir', axis=-1)¶

downsample the signal x by an integer factor q, using an order n filter

By default an order 8 Chebyshev type I filter is used or a 30 point FIR filter with hamming window if ftype is ‘fir’.

Parameters :

x : N-d array

the signal to be downsampled

q : int

the downsampling factor

n : int or None

the order of the filter (1 less than the length for ‘fir’)

ftype : {‘iir’ or ‘fir’}

the type of the lowpass filter

axis : int

the axis along which to decimate

Returns :

y : N-d array

the down-sampled signal