[R] Keeping track of occurrence of warning message

[Tan Chuen Seng]

Hi Laurent,

Sorry to trouble you again. I have little idea how to get R to know if a
warning has taken place. I tried using last.warning as I think it was
what you suggested. But still track.warning is NULL although there are
warnings. The code goes something like this:

w1<-0
track.warning<-NULL
....
if(length(last.warning)>w1){
track.warning<-c(track.warning,data.no)
}

It seems to me that length(last.warning)==0 throughout the running of
the program although in the end there are still errors.

Please advice. Thanks for your help.

>From chuen seng


-----Original Message-----
From: Laurent Gautier [mailto:laurent at cbs.dtu.dk] 
Sent: Wednesday, July 16, 2003 3:34 PM
To: Tan Chuen Seng
Subject: Re: [R] Keeping track of occurrence of warning message


On Tue, Jul 15, 2003 at 05:51:32PM +0800, Tan Chuen Seng wrote:
> Hi Laurent,
> 
> Thanks for the suggestion. However I am not too sure how to access
> this last.warning while in the loop. From my understanding, I can't 
> get dimensions from a list.

l <- list(a=1:2, b=letters[1:5])
length(l)
lapply(l, length)

...if it answers your question....



> 
> Please advice.
> 
> >From chuen seng
> 
> -----Original Message-----
> From: Laurent Gautier [mailto:laurent at cbs.dtu.dk]
> Sent: Tuesday, July 15, 2003 3:17 PM
> To: Tan Chuen Seng
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] Keeping track of occurrence of warning message
> 
> 
> On Tue, Jul 15, 2003 at 02:58:10PM +0800, Tan Chuen Seng wrote:
> > Hi there,
> > 
> > I am interested if there is anyway to keep track of the occurrence
> > of
> > warning message.
> > 
> > I know that warnings will only be printed out at the end of the 
> > program if warn=0. However I am also interested at which particular 
> > set of data does the warnings occur too. This is because I am 
> > running 1000 data, so if there are 2 or 3 data that give warnings, I

> > would like to know which are the ones out of the 1000 data.
> > 
> > I tried using the following code in the program to indicate where
> > the
> > warning occur but was unable to get anything recorded although the
> > warnings() gave me 12 messages.
> > 
> > track.warning<-NULL
> > ....
> > if(options("warn")$warn>=0){
> > track.warning<-c(track.warning,data.no)
> > }
> > 
> > 
> > Your help is greatly appreciated. Thanks.
> > 
> > >From chuen seng
> > 
> > 	[[alternative HTML version deleted]]
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list 
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 
> 
> One way to do things is to have a list to store warnings has you hit
> them in you loop: you can access what is the list last.warning.
> 
> 
> 
> Hopin' it helps,
> 
> 
> 
> L.
> 
> 

-- 
--------------------------------------------------------------
currently at the National Yang-Ming University in Taipei, Taiwan
--------------------------------------------------------------
Laurent Gautier			CBS, Building 208, DTU
PhD. Student			DK-2800 Lyngby,Denmark	
tel: +45 45 25 24 89		http://www.cbs.dtu.dk/laurent