How to get the answer from ifourier function?

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?

Answer 1

[Vandana Rajan]

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