rfft#
- pynlo.utility.fft.rfft(x, fsc=1.0, n=None, axis=-1)[source]#
Use MKL to perform a 1D FFT of the real input array along the given axis. The output array is complex and only contains positive frequencies.
The length of the transformed axis is
n//2 + 1.- Parameters:
- xarray_like
Input array, must be real.
- fscfloat, optional
The forward transform scale factor. The default is 1.0.
- nint, optional
Number of points to use along the transformed axis of the input. If n is smaller than the length of the input, the input is cropped. If it is larger, the input is padded with zeros.
- axisint, optional
Axis over which to compute the FFT. The default is the last axis.
- Returns:
- complex ndarray
The transformed array.