pwtools.num.rms¶

pwtools.num.rms(arr, nitems='all')[source]¶

RMS of all elements in a ndarray.

Parameters:

arr (ndarray) –
nitems ({'all', float}) – normalization constant, the sum of squares is divided by this number, set to unity for no normalization, if ‘all’ then use nitems = number of elements in the array

Returns:

rms

Return type:

scalar