[R] catch error/warning message in a loop

[array chip]

cat can only catch the error message promptly, but
seems not able to catch the warning message promptly.
Can anyone point out how i can catch the warning
message in a loop?


--- Spencer Graves <spencer.graves at PDF.COM> wrote:
> 	  With situations like this, I often include
> something like "cat(i, 
> '')" in the loop (where "i" is the index of the
> loop).
> 
> 	  If I'm writing a function to be used by others, I
> might use "try", as 
> described, e.g. in Venables and Ripley (2000) S
> Programming (p. 48).
> 
> hth.  spencer graves
> 
> array chip wrote:
> > Hi, I am running cox regreesion (coxph) on a large
> > number of independent variables, one variable at a
> > time, using loop. At some point of the loop, the
> cox
> > regression stopped due to some errors. How can I
> know
> > at which variable the cox regression stopped so
> that I
> > can pinpoint the variable that causes the problem?
> I
> > guess this is not unique to cox regression, it is
> the
> > problem of catching the error/warning message
> promptly
> > in a loop.
> > 
> > tahnks
> > 
> > __________________________________
> > 

> to Outlook(TM).
> > 
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