How do I manipulate the variable with respect to which IFFT is computed?

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ariel22
ariel22 2016-5-23
回答： Todd Leonhardt 2016-5-23
How do I manipulate the variable with respect to which FFT or IFFT is computed in MATLAB? Say for example my function has two variables, but I only want to find the IFFT treating one of them as frequency. Basically I want to know how MATLAB's ifft function decides the variable with respect to which the integral of the transform will be found. Specifically, I need to compute the following integral :
How do I go about this? Thanks!

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回答（1 个）

Todd Leonhardt
Todd Leonhardt 2016-5-23
From MATLAB's fft function documentation:
fft(X,[],DIM) or fft(X,N,DIM) applies the fft operation across the dimension DIM.
Online fft documentation
MATLAB's ifft function behaves analogously.

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