From h.wickham at gmail.com  Tue Sep  5 17:13:58 2006
From: h.wickham at gmail.com (hadley wickham)
Date: Tue, 5 Sep 2006 10:13:58 -0500
Subject: [Rd] Capturing warnings with capture.output
In-Reply-To: <971536df0608290807m607951f8j6ded7cba36e7c5c9@mail.gmail.com>
References: <f8e6ff050608290746x420b56e7i5c7d7fabea9a9c98@mail.gmail.com>
	<971536df0608290807m607951f8j6ded7cba36e7c5c9@mail.gmail.com>
Message-ID: <f8e6ff050609050813t46851a59xf4325fd813e6d503@mail.gmail.com>

> 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
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
>




[Rd] Capturing warnings with capture.output
hadley wickham