How do I plot fourier transform signals in Matlab

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Lucy Mokaya
Lucy Mokaya 2021-4-15
评论： Lucy Mokaya 2021-4-16
To find Fourier transform (spectrum) of the following signals using MATLAB command “fourier”. To make a plot of signal and spectrum (modulus)
f(t)=e^(-|t| )*cos⁡(20t)
  2 个评论
Star Strider
Star Strider 2021-4-15
Replace:
e^(-|t| )
with:
exp(-|t| )
then put a multiplication operator vetween 20 and ‘t’:
cos⁡(20*t)
and go from there.

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采纳的回答

Star Strider
Star Strider 2021-4-15
f = @ (t) exp(-abs(t)).*cos(20*t);
figure
fplot(f)
for the Symbolic Math Toolbox, this becomes:
syms t
f(t) = exp(-abs(t))*cos(20*t);
I leave the rest to you.

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