[Numpy-discussion] Normalization of ifft
Thu Mar 26 21:02:26 CDT 2009
I thought it was the same as the MATLAB format:
On Mar 26, 2009, at 7:56 PM, Lutz Maibaum wrote:
> I just started to use python and numpy for some numerical analysis. I
> have a question about the definition of the inverse Fourier transform.
> The user gives the formula (p.180)
> x[m] = Sum_k X[k] exp(j 2pi k m / n)
> where X[k] are the Fourier coefficients, and n is the length of the
> The online documentation
> (http://docs.scipy.org/doc/numpy/reference/routines.fft.html), on the
> other hand, states that there is an additional factor of 1/n, which is
> required to make ifft() the inverse of fft(). Is this a misprint in
> the user guide?
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