[R] Numerical integration of a two dimensional function over a disk

[Jeff Newmiller]

"Simply impossible" seems an odd description for a technique described in every elementary calculus text under the heading "integration in cylindrical coordinates".
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Sent from my phone. Please excuse my brevity.

yingfu xie <xieyingfu at yahoo.com> wrote:

>Hello, there!
>�
>Basically my problem is very clear. I would like to take a
>(numerical)�integration of a function f(x,y) which can be quite complex
>of x and y, over a disk (x-a)^2+(y-b)^2<= r^2 (with r constant).
>However, after some search in R, I just cannot find a function in R
>that suits my purpose. Function Integrate applies to one dimensional,
>and adaptIntegrate to�rectangle. In my case, it is not easy or
>simply�impossible�to transform�the definition area�to a rectangle with
>constant�boundaries. ��I must have missed something, but is there any R
>function which can solve the integration without going to ex. Monto
>Carlo? Many thanks in advance!
>�
>Best regards,
>Yingfu
>	[[alternative HTML version deleted]]
>
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