How to get the answer from ifourier function?

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Sijie Cheng
Sijie Cheng 2016-12-16
回答： Vandana Rajan 2016-12-19
I try to get the inverse fourier by ifourier.
The programming is below.
clc
clear
syms t f
rect=@(x)rectangularPulse(x);
tri=@(x)triangularPulse(x);
T0=0.01;
B=150;
tt=-200:0.111:200;
m_t=tri(t/T0);
m_f=fourier(subs(m_t,t,t/(2*pi))/(2*pi),t,f);
b_f=rect(f/(2*B));
bm_f=m_f*b_f;
bm_t=ifourier(subs(bm_f,f,f/(2*pi)),f,t);
bm_t_d=abs(subs(bm_t,t,tt));
plot(tt,bm_t_d);
However, finally, I just got "Error using plot Non-numeric data is not supported in 'Line'".
What should I do?

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回答（1 个）

Vandana Rajan
Vandana Rajan 2016-12-19
Hi Sijie Cheng,
Since you are using symbolic expression, you should use the command 'fplot' instead of 'plot'.
Please use the MATLAB documentation link below for details on 'fplot'.
https://www.mathworks.com/help/symbolic/fplot.html

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