I would like to do an inverse fourier transform using MATLAB's IFFT. I am confused by MATLAB'S single input of X for its IFFT function. Has anyone had experience using MATLAB for these tranforms? I would like to do an inversion of fourier transform for my function y(iw) at some value real value z. I am confused at how to specify my function y(iw) and z in MATLAB's IFFT(X). In the continuous setting, the inverse fourier transform, ift(), would be ift(z) = 1/2pi * Integral [ e^(-iwz) y(iw) dw ] In other words, I specify z and specify y, which is only a function of w which I am integrating over. But how do I do this using MATLAB's IFFT, when it only takes an input X... Does anyone have any recommendations of computationally solving these integrals for vectors of z and known analytical expression of y(iw)?