[Rd] Capturing warnings with capture.output

[hadley wickham]

> Something like this which displays the warnings and also writes
> them to out so that they are captured:

Is it possible to not display the warnings (just write them out) ?

Hadley




>
> out <- capture.output(
>    withCallingHandlers({
>         print(1)
>         warning("A warning.")
>         print(2)
>         warning("Another warning.")
>         print(3)
>    }, warning = function(x) cat(x$message, "\n"))
> )
>
> print(out)
>
>
> On 8/29/06, hadley wickham <h.wickham at gmail.com> wrote:
> > Is there any way to include warnings in the output from capture.output?  eg:
> >
> > a <- capture.output(warning("test"))
> > all.equal(a, "Warning message: \n test ")
> >
> > Conceptually, this seems like redirecting stderr to stdout, or somehow
> > changing warning to simple print it's output.  I've had a look at
> > tryCatch and using a warning handler, but this terminates execution at
> > the warning.
> >
> > Thanks,
> >
> > Hadley
> >
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> >
>