which packages do I need to use 'integral' function?

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which packages do I need to use 'integral' function? I type it on command line in 2011b and get an "Undefined function" error
>> fun = @(x) exp(-x.^2).*log(x).^2;
>> q = integral(fun,0,Inf)
Undefined function 'integral' for input arguments of type 'function_handle'.

Accepted Answer

Andrei Bobrov
Andrei Bobrov on 12 Oct 2012
use function quadgk
eg
>> fun = @(x) exp(-x.^2).*log(x).^2;
>> quadgk(fun,0,inf)
ans =
1.9475

More Answers (2)

Ilham Hardy
Ilham Hardy on 12 Oct 2012
It is Matlab standard function, only available in R2012b.

Andreas Goser
Andreas Goser on 12 Oct 2012
This was introduced in R2012a:
"The new functions, integral, integral2, and integral3 perform numerical integration with additional support for nonrectangular and unbounded regions of integration. They are the recommended functions for performing quadrature."

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