diff options
Diffstat (limited to 'numpy')
| -rw-r--r-- | numpy/fft/fftpack.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/numpy/fft/fftpack.py b/numpy/fft/fftpack.py index 4ad4f6802..398eec45e 100644 --- a/numpy/fft/fftpack.py +++ b/numpy/fft/fftpack.py @@ -204,9 +204,11 @@ def ifft(a, n=None, axis=-1, norm=None): The input should be ordered in the same way as is returned by `fft`, i.e., ``a[0]`` should contain the zero frequency term, - ``a[1:n/2+1]`` should contain the positive-frequency terms, and + ``a[1:n/2]`` should contain the positive-frequency terms, and ``a[n/2+1:]`` should contain the negative-frequency terms, in order of - decreasingly negative frequency. See `numpy.fft` for details. + decreasingly negative frequency. For an even number of input points, + ``A[n/2]`` represents both positive and negative Nyquist frequency. + See `numpy.fft` for details. Parameters ---------- |