Can we find the fourier transform of a function?

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Seetha Rama Raju Sanapala
评论： Seetha Rama Raju Sanapala 2015-6-8
In symbolic tool box, there is a function called fourier which is supposed to give the FT of a function. Example below works
syms x y
f = exp(-x^2);
fourier(f, x, y)
But I find that this does not work. why?
syms x y
f = exp(-x^4);
fourier(f, x, y)
How do you represent a rectangular pulse function in MATLAB so that I can get the FT of it?
rect(t) = 1 if t is between -0.5 and 0.5 inclusive and zero outside.
  2 个评论
Seetha Rama Raju Sanapala
Seetha Rama Raju Sanapala 2015-6-8
It just gives the answer as FT of the given function. Basically it just repeats your question as answer. I tried expand, simplify etc but to no avail.

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回答（1 个）

Walter Roberson
Walter Roberson 2015-6-8
Rectangular pulse that is 1 between A and B is
Heaviside(x-A) - Heaviside(x-B)

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