Dear r-users, Is there any command in R allowing to evaluate a double integral? for instance let say I want to evaluate the following integral: integrate[lo=(0,1),up=(2,3)] f(x,y)=x^2+y^2 where lo is the vector of lower bounds and up that of upper bounds. I thaught the function "adapt" would work but it did not. Many thanks, Dominique K.
Try RSiteSearch("double integral")
On 5/5/06, Dominique Katshunga <dkat at stats.uct.ac.za>
wrote:> Dear r-users,
> Is there any command in R allowing to evaluate a double integral? for
> instance let say I want to evaluate the following integral:
> integrate[lo=(0,1),up=(2,3)] f(x,y)=x^2+y^2
> where lo is the vector of lower bounds and up that of upper bounds.
> I thaught the function "adapt" would work but it did not.
> Many thanks,
> Dominique K.
>
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On Fri, 5 May 2006, Dominique Katshunga wrote:> Dear r-users, > Is there any command in R allowing to evaluate a double integral? for > instance let say I want to evaluate the following integral: > integrate[lo=(0,1),up=(2,3)] f(x,y)=x^2+y^2 > where lo is the vector of lower bounds and up that of upper bounds. > I thaught the function "adapt" would work but it did not.Works for me:> library(adapt) > help(adapt) > adapt(2,c(0,2),c(1,3),functn=function(xy) xy[1]^2+xy[2]^2)value relerr minpts lenwrk ifail 6.666667 7.315578e-08 165 73 0 -thomas