11.10.2. astroML.fourier.IFT_continuous¶
- astroML.fourier.IFT_continuous(f, H, axis=-1, method=1)[source]¶
Approximate a continuous 1D Inverse Fourier Transform with sampled data.
This function uses the Fast Fourier Transform to approximate the continuous fourier transform of a sampled function, using the convention
It returns t and h, which approximate h(t).
Parameters : f : array_like
regularly sampled array of times t is assumed to be regularly spaced, i.e. f = f0 + Df * np.arange(N)
H : array_like
real or complex signal at each time
axis : int
axis along which to perform fourier transform. This axis must be the same length as t.
Returns : f : ndarray
frequencies of result. Units are the same as 1/t
H : ndarray
Fourier coefficients at each frequency.