Can't help, code runs fine on my machine once you change "valu" to "value."
Are you sure it fails in a vanilla run of R and isn't caused by any other
choices you have made along the way?

Michael

PS -- Here's the code

func <- function(y, a, rate, sad){
    f3 <- function(z){
        f1 <- function(y,a,n){
            dpois(y,a*n)
        }

        f2 <- function(n,rate){
            dexp(n,rate)
        }

        f <- function(n){
            f1(y,a,n)*f2(n,rate)
        }

        r <- 0
        r1 <- 1
        x1 <- 0
        dx <- 20

        while(r1 > 10e-500){
            r1 <- integrate(f,x1,x1+dx)$value
            r <- r + r1
            x1 <- x1 + dx
        }

        r + integrate(f,x1,Inf)$value
    }
 sapply(y,f3)
}

V = func(200,0.1,0.1,sad=Exp)

On Mon, Aug 29, 2011 at 11:16 AM, . . <xkziloj@gmail.com> wrote:

> Why I am getting
>
> Error in integrate(f, x1, x1 + dx) :
>  maximum number of subdivisions reached
>
> and can I avoid this?
>
> func <- function(y, a, rate, sad){
> f3 <- function(z){
>  f1 <- function(y,a,n){
>    dpois(y,a*n)
>  }
>  f2 <- function(n,rate){
>    dexp(n,rate)
>  }
>  f <- function(n){
>    f1(y,a,n)*f2(n,rate)
>  }
>  r <- 0
>  r1 <- 1
>  x1 <- 0
>  dx <- 20
>  while(r1 > 10e-500){
>  r1 <- integrate(f,x1,x1+dx)$value
>    r <- r + r1
>    x1 <- x1 + dx
>  }
>  r + integrate(f,x1,Inf)$valu
> }
>  sapply(y,f3)
> }
> func(200,0.1,0.1,sad=Exp)
>
> Thanks in advance.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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