diff options
Diffstat (limited to 'numpy/fft/fftpack.py')
| -rw-r--r-- | numpy/fft/fftpack.py | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/numpy/fft/fftpack.py b/numpy/fft/fftpack.py index 4961b2989..2ca6cc668 100644 --- a/numpy/fft/fftpack.py +++ b/numpy/fft/fftpack.py @@ -273,7 +273,7 @@ def rfft(a, n=None, axis=-1): out : complex ndarray The truncated or zero-padded input, transformed along the axis indicated by `axis`, or the last one if `axis` is not specified. - If `n` is even, the length of the transformed axis is ``(n/2)+1``. + If `n` is even, the length of the transformed axis is ``(n/2)+1``. If `n` is odd, the length is ``(n+1)/2``. Raises @@ -298,13 +298,13 @@ def rfft(a, n=None, axis=-1): compute the negative frequency terms, and the length of the transformed axis of the output is therefore ``n//2+1``. - When ``A = rfft(a)`` and fs is the sampling frequency, ``A[0]`` contains + When ``A = rfft(a)`` and fs is the sampling frequency, ``A[0]`` contains the zero-frequency term 0*fs, which is real due to Hermitian symmetry. - If `n` is even, ``A[-1]`` contains the term representing both positive - and negative Nyquist frequency (+fs/2 and -fs/2), and must also be purely - real. If `n` is odd, there is no term at fs/2; ``A[-1]`` contains - the largest positive frequency (fs/2*(n-1)/n), and is complex in the + If `n` is even, ``A[-1]`` contains the term representing both positive + and negative Nyquist frequency (+fs/2 and -fs/2), and must also be purely + real. If `n` is odd, there is no term at fs/2; ``A[-1]`` contains + the largest positive frequency (fs/2*(n-1)/n), and is complex in the general case. If the input `a` contains an imaginary part, it is silently discarded. |