How to get the answer from ifourier function?

2016 12 16
1 个回答
更新时间：2016 12 19
6 次查看（30 天）

0 个投票

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

0 个投票

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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