I am trying to plot symbolic variable in MATLAB, for which I have used the same strategy that is available in an answer to a similar question.
This is my code, which outputs a blank graph:
syms t w
x=exp(-t^2)
h=exp(-t)*heaviside(t)+exp(t)*heaviside(-t)
X=fourier(x,w);
H=fourier(h,w);
right=ifourier( rewrite(X*H, 'exp'),t)
fplot(right,[0 8])
How can I make the graph appear?
The problem is that MATLAB ifourier function cannot compute the inverse Fourier transform of the product X*H.
Check that X*H returns:
X*H
Rewriting the expression does not change it at all:
rewrite(X*H, 'exp')
Either way, when computing the inverse Fourier transform:
right=ifourier( X*H,t)
Documentation on the ifourier function states that:
If ifourier cannot transform the input, then it returns an unevaluated call to fourier.
Since it cannot evaluate explicitly the function, it cannot plot it.