R help - Oct 2008 - Remove warnings.

I have a function that could possibly generate warnings in a loop. What I want
is to report the warnings (warnings()) then clear out the last.warning object so
that if there is a call without warnings I will not see the previous warning.
Some example code:

generatewarning <- function(s)
{
	warning(s)
}

loop <- function(f=TRUE)
{
    if(f)
    {
	for(.index in 1:10)
	{
     		if(.index %% 2)
     		{
          		generatewarning(sprintf("%d warning", .index))
     		}
	}
     }
}

loop()
warnings("TRUE")
loop(FALSE)
warnings("FALSE")
loop()
warnings("TRUE")

Notice that the call to "warnings("FALSE")" still reports
the warnings from the previousely generated warnings. I want to
"clear" this set since it has already been reported. Is there a way to
do this?

Thank you.

Kevin

Why don't you just suppress the warning messages you are not interested in?

?suppressWarnings

Hadley


On Tue, Oct 14, 2008 at 7:59 AM,  <rkevinburton at charter.net>
wrote:
> I have a function that could possibly generate warnings in a loop. What I
want is to report the warnings (warnings()) then clear out the last.warning
object so that if there is a call without warnings I will not see the previous
warning.
> Some example code:
>
> generatewarning <- function(s)
> {
>        warning(s)
> }
>
> loop <- function(f=TRUE)
> {
>    if(f)
>    {
>        for(.index in 1:10)
>        {
>                if(.index %% 2)
>                {
>                        generatewarning(sprintf("%d warning",
.index))
>                }
>        }
>     }
> }
>
> loop()
> warnings("TRUE")
> loop(FALSE)
> warnings("FALSE")
> loop()
> warnings("TRUE")
>
> Notice that the call to "warnings("FALSE")" still
reports the warnings from the previousely generated warnings. I want to
"clear" this set since it has already been reported. Is there a way to
do this?
>
> Thank you.
>
> Kevin
>
> ______________________________________________
> R-help at 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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