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IDFT - Inverse normalized Discrete Fourier Transform

Usage

f=idft(c);
f=idft(c,N,dim);

Description

idft computes a normalized or unitary inverse discrete Fourier transform. The unitary discrete Fourier transform is computed by

\begin{equation*} f\left(l+1\right)=\frac{1}{\sqrt{L}}\sum_{k=0}^{L-1}c\left(k+1\right)e^{2\pi ikl/L} \end{equation*}

for \(l=0,\ldots,L-1\).

The output of idft is a scaled version of the output from ifft. The function takes exactly the same arguments as ifft. See the help on ifft for a thorough description.