integral2 in matlab 2010

2012 5 2
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Sean de Wolski
Sean de Wolski 2012-5-2

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If your company/university/employer is current on their SMS subscription, you can download the latest versions from:
http://www.mathworks.com/downloads/web_downloads/

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the cyclist
the cyclist 2012-5-2

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dblquad

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Lusine
Lusine 2012-5-2
But as I know dblquand can not be used when the bounds are infinite
the cyclist
the cyclist 2012-5-2
Please consider editing your question so that it includes all the relevant details, rather than writing the briefest possible question (which tends to elicit the briefest possible answer).
Lusine
Lusine 2012-5-2
Sory! I need a function to clculate a double integral when the lower bound is negative infinity. As I unerstand interal2 function allows this, but I have mahlab 2010. So if its possible could You help me?
Sean de Wolski
Sean de Wolski 2012-5-2
You could always upgrade to R2012a!
Lusine
Lusine 2012-5-2
And how?
Walter Roberson
Walter Roberson 2012-5-2
dblquad() allows you to specify the integration method, which could be quadgk() (possibly with a wrapper added to account for vector valued or scalar valued.)
Lusine
Lusine 2012-5-2
Do you mean I can use an expression like this?
fun=@(x,y)exp(-(x.^2-2*ro*x*y+y.^2)/2*(1-ro).^2);
q=dblquad(fun,-Inf,0,-Inf,0,[],quadgk(),0.5)

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