[R] Query about using try block

[lalitha viswanath]

Hi
Thanks for your response.
However I seem to be doing something wrong regarding
the try block resulting in yet another error described
below.

I have a function that takes in a file name and
does the fit for the data in that file.
Hence based on your input, I tried

try ( (fit = lm(y~x, data = data_fitting)), silent =
T);


I left the subsequent lines of my code unchanged.
coeffs = as.list(coef(fit);
lambda = exp(coeffs$x)....

After the change using try, when I tried to resume
processing under R as follows
source("fitting.R")
for filename in list { process(filename); }
It says "Cannot find object "fit" "...(in the line
trying to get the coefficients...)

Am I closing the try block in the wrong place?
This function does some post processing on the
coefficients returned by coef(fit), puts them in a
list and sends it to another function.
(i.e. around 6 lines of code after the call to fit).
Thanks
Lalitha
--- Andreas Hary <andreashary at googlemail.com> wrote:

> Look at ?try
> 
> Your code will probably need to be something like
> the following:
> 
> fit <- list()
> for(fileId in 1:n){
>    try(fit[i] <- lm(formula,data=???,...), silent=F)
>    #or silent=T if you would like to be made aware
> of problems
> }
> 
> Best wishes,
> 
> Andreas
> 
> 
> 
> 
> 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
> > 
> > 
> >  
> >
>
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> > 
> 
> -- 
> =============================
> Andreas Hary
> Flat 5, 70 Finsbury Park Road
> Lond, N4 2JX, UK
> 
> Email:	andreashary at gmail.com
> Mobile: 07906 860 987
> 



 
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