error message undefined function or variable ‘integral’ .

2018 11 9
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更新时间：2018 11 26
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Dear all ,i made numerical integration in script bit i get error message : undefined function or variable ‘integral’ .

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madhan ravi
madhan ravi 2018-11-9
编辑：madhan ravi 2018-11-9

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It’s integral not 'integral' no strings around

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Mohamad
Mohamad 2018-11-9
编辑：madhan ravi 2018-11-9
The code given below , when I run it i get the message :
Undefined function or variable 'integral'.
% FS for triangle periodic triangle function
% Compelx exponential FS
clc
clear;
a=-1
b=1
T0=b-a
N=11
F0=1/T0
wi=[-N:N]*2*pi/T0;
t=(a:0.2:b)';
D=zeros(2*N+1,1);
xt=my_tri(t);
fun1 = @(t)my_tri(t);
q1 = integral(fun1, a,b);
D(N+1)=q1/T0;
madhan ravi
madhan ravi 2018-11-9
编辑：madhan ravi 2018-11-9
I suspect that integral is available only from 2012a which version are you using?
see https://www.mathworks.com/help/releases/R2012a/techdoc/ref/integral.html
so try
https://www.mathworks.com/help/matlab/ref/quad.html
q1 = quad(fun1, a,b);
might work
Mohamad
Mohamad 2018-11-26
Ok , thanks a lot , the problem solved

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