diff options
Diffstat (limited to 'numpy/fft/fftpack.py')
| -rw-r--r-- | numpy/fft/fftpack.py | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/numpy/fft/fftpack.py b/numpy/fft/fftpack.py index d74307f5e..a63977912 100644 --- a/numpy/fft/fftpack.py +++ b/numpy/fft/fftpack.py @@ -458,30 +458,34 @@ def hfft(a, n=None, axis=-1): def ihfft(a, n=None, axis=-1): """ - Compute the inverse fft of a signal whose spectrum has Hermitian symmetry. + Compute the inverse FFT of a signal whose spectrum has Hermitian symmetry. Parameters ---------- a : array_like Input array. n : int, optional - Length of the ihfft. + Length of the inverse FFT. axis : int, optional - Axis over which to compute the ihfft. + Axis over which to compute the inverse FFT, assuming Hermitian + symmetry of the spectrum. Default is the last axis. + + Returns + ------- + out : ndarray + The transformed input. See also -------- - rfft, hfft + hfft, irfft Notes ----- - These are a pair analogous to rfft/irfft, but for the + `hfft`/`ihfft` are a pair analogous to `rfft`/`irfft`, but for the opposite case: here the signal is real in the frequency domain and has - Hermite symmetry in the time domain. So here it's hermite_fft for which - you must supply the length of the result if it is to be odd. - - ihfft(hfft(a), len(a)) == a - within numerical accuracy. + Hermite symmetry in the time domain. So here it's `hfft` for which + you must supply the length of the result if it is to be odd: + ``ihfft(hfft(a), len(a)) == a``, within numerical accuracy. """ |