How can I do integration in MATLAB without "int" function?

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/sym.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.

Answer 1

[MathWorks Support Team]

This is because the "int" function does not come with the base MATLAB, but the Symbolic Math Toolbox:

https://www.mathworks.com/help/symbolic/sym.int.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)