[R] Redirect output of traceback() to a file?

[David Winsemius]

On Aug 31, 2011, at 9:58 AM, . . wrote:

> Hi all,
>
> I am getting evaluation nested too deeply: infinite recursion /
> options(expressions=)? in my code.

Splitting this into another thread seems unnecessary.

>
> Trying to investigate it with traceback() returns a very long list,
> index go even more then 495, so I can not read everything because it
> is not possible to scroll more.
>
> Is it possible to redirect output of traceback to a file?

?sink
?capture.output

(From your offline communication I got the idea you were running R  
2.8.1. If that is true, then you should make that fact more apparent  
to your audience.)

> This is the
> only solution I can think, is there another?
>
> Any comments are welcome.
>
> Thanks.
>
> func <- Vectorize(function(x, a, sad, trunc=0, ...) {
>  result <- function(x) {
>    f1 <- function(n) {
>      dcom <- paste("d", deparse(substitute(sad)), sep="")
>    	dots <- c(as.name("n"), list(...))
> 			f <- do.call(dcom, dots)
>      g <- dpois(x,a*n)
>      f * g
>    }
>    integrate(f1, 0, Inf)$value
>  }
>  return(result(x) / (1 - result(trunc)))
> }, "x")
>
> func(1, 0.1, exp)
>
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> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT