- cupyx.scipy.fftpack.rfft(x, n=None, axis=-1, overwrite_x=False, plan=None)[source]#
Compute the one-dimensional FFT for real input.
The returned real array contains
[y(0),Re(y(1)),Im(y(1)),...,Re(y(n/2))] # if n is even [y(0),Re(y(1)),Im(y(1)),...,Re(y(n/2)),Im(y(n/2))] # if n is odd
x (cupy.ndarray) – Array to be transformed.
n (None or int) – Length of the transformed axis of the output. If
nis not given, the length of the input along the axis specified by
axis (int) – Axis over which to compute the FFT.
overwrite_x (bool) – If True, the contents of
xcan be destroyed.
a cuFFT plan for transforming
axis, which can be obtained using:
plan = cupyx.scipy.fftpack.get_fft_plan( x, axes, value_type='R2C')
Note that plan is defaulted to None, meaning CuPy will either use an auto-generated plan behind the scene if cupy.fft.config. enable_nd_planning = True, or use no cuFFT plan if it is set to False.
The transformed array.
- Return type
The argument plan is currently experimental and the interface may be changed in the future version.