[R] cuhre usage ?? multidimensional integration

[R. Michael Weylandt]

I'd heartily suggest you read some basic R references before trying to
engage this question: a cursory glance over your code suggests it can
(and should) be entirely rewritten without for loops using
vectorization and possibly a product function like this one that I'll
provide you with:

product <- function(x) exp(sum(log(x)))

I'd do it myself, but to be honest, I don't really understand how its
supposed to work. What is the point of "looping" from 1 to 1 so many
times?

As to your question, your first error comes from trying to apply
multivariate integration techniques to a function of a single
variable. Specifically, you give R secondary and (possibly) tertiary
arguments and tell it to hand them to a univariate function -- hence
the error. Your second error is probably caused by the fact that you
now have a function of four variables -- x,g, i, j -- where i is never
used other than the iterator (and you can't trick R so don't even go
down that path), g is overwritten before being accessed, and j just
doesn't appear at all.

Michael

On Wed, Oct 5, 2011 at 5:07 PM, sevenfrost <linshuang11 at gmail.com> wrote:
> cuhre is a function in package R2Cuba for multidimensional integration.
>
> There are three kind of variables to integrate. I just use y,w,t to
> distinguish them from each other. Is there any problem ?
>
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