R help - Jan 2007 - Query about using optimizers in R without causing program to crash

Hi
I am a newbie to R and am using  the lm function to
fit my data.
This optimization is to be performed for around 45000
files not all of which lend themselves to
optimization. Some of these will and do crash.
 
However, How do I ensure that the program simply goes
to the next file in line without exiting the code with
the error
"Error in lm.fit(x, y, offset = offset, singular.ok singular.ok, ...) : 
        NA/NaN/Inf in foreign function call (arg 4)"
everytime it encounters troublesome data?

I would greatly appreciate your input as it would
avoid me having to manually type
for fileId in (c(4351:46000)) { ... }
for fileId in (c(5761:46000)) { ... }, etc...

Thanks
Lalitha


 
____________________________________________________________________________________
Now that's room service!  Choose from over 150,000 hotels

Hi Lalitha,

Use 

try()

or 

tryCatch()

Cheers

Andrew

On Mon, Jan 22, 2007 at 12:43:28PM -0800, lalitha viswanath
wrote:
> Hi
> I am a newbie to R and am using  the lm function to
> fit my data.
> This optimization is to be performed for around 45000
> files not all of which lend themselves to
> optimization. Some of these will and do crash.
>  
> However, How do I ensure that the program simply goes
> to the next file in line without exiting the code with
> the error
> "Error in lm.fit(x, y, offset = offset, singular.ok > singular.ok,
...) :
>         NA/NaN/Inf in foreign function call (arg 4)"
> everytime it encounters troublesome data?
> 
> I would greatly appreciate your input as it would
> avoid me having to manually type
> for fileId in (c(4351:46000)) { ... }
> for fileId in (c(5761:46000)) { ... }, etc...
> 
> Thanks
> Lalitha
> 
> 
>  
>
____________________________________________________________________________________
> Now that's room service!  Choose from over 150,000 hotels
> 
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
http://www.ms.unimelb.edu.au/~andrewpr
http://blogs.mbs.edu/fishing-in-the-bay/

This is answered in the FAQ list.

 	-thomas

On Mon, 22 Jan 2007, lalitha viswanath wrote:
> Hi
> I am a newbie to R and am using  the lm function to
> fit my data.
> This optimization is to be performed for around 45000
> files not all of which lend themselves to
> optimization. Some of these will and do crash.
>
> However, How do I ensure that the program simply goes
> to the next file in line without exiting the code with
> the error
> "Error in lm.fit(x, y, offset = offset, singular.ok > singular.ok,
...) :
>        NA/NaN/Inf in foreign function call (arg 4)"
> everytime it encounters troublesome data?
>
> I would greatly appreciate your input as it would
> avoid me having to manually type
> for fileId in (c(4351:46000)) { ... }
> for fileId in (c(5761:46000)) { ... }, etc...
>
> Thanks
> Lalitha
>
>
>
>
____________________________________________________________________________________
> Now that's room service!  Choose from over 150,000 hotels
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>
Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle