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

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Xin
Xin 2012-10-12
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'.

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2012-10-12
use function quadgk
eg
>> fun = @(x) exp(-x.^2).*log(x).^2;
>> quadgk(fun,0,inf)
ans =
1.9475

更多回答（2 个）

Ilham Hardy
Ilham Hardy 2012-10-12
It is Matlab standard function, only available in R2012b.
Andreas Goser
Andreas Goser 2012-10-12
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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