>Date: Tue, 05 Nov 2002 16:52:58 +0100
>To: r-help at lists.R-project.org
>From: Marta Rufino <mrufino at cmima.csic.es>
>Subject: last.warning and function problem
>
>Hello,
>
>I am a newbie in R and I am trying to create a function, that includes
several functions inside.>To avoid that everything stops if there is an error, I have this statement
>
>bla = function(....){
>...
>if(exists("last.warning")){rm(last.warning)}
>...
>}
>
>inside the function, which if I use it normally, it works fine, but once I
use it with the funciotn it gives me an error like:>
>$"remove: variable "last.warning" was not found"
>NULL
>
>which breaks my function.
>I just want to make it do: if exists the file last warning, remove it, if
not, just proceed...>Does anyone knows why this happens? How can I avoid it?
>Thanks in advance.
>Marta
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Marta Rufino
Centre Mediterrani d'Investigacions Marines i Ambientals
(CMIMA). CSIC
Passeig Maritim 37-49
08003 BARCELONA
Tfno:34 93 230 95 40
Tfax:34 93 230 95 55
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