MATLAB: How to do integration in MATLAB without “int” function

integralnumericalsymbolicSymbolic Math Toolbox

I am trying to do basic integration in MATLAB.
From the online documentation, I see that I can use the "int" function:
https://www.mathworks.com/help/symbolic/int.html
However, when I try to use it, I get an error saying that I do not have a license to run the function.

Best Answer

This is because the "int" function does not come with the base MATLAB, but the Symbolic Math Toolbox:
https://www.mathworks.com/products/symbolic.html
You can check whether you have the Symbolic Math Toolbox installed by executing the following command in MATLAB's Command Window:
>> ver
If "Symbolic Math Toolbox" is not listed as the output of the "ver" command, you can still do numerical integration in MATLAB using the "integral" function:
https://www.mathworks.com/help/matlab/ref/integral.html
For example, in MATLAB you can do:
>> fun = @(x) exp(-x.^2).*log(x).^2;
>> q = integral(fun,0,Inf)
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