[R] Error reporting in R
Hello, I am hoping someone can help me with the following: I am applying the function mle on a single data set X n times, each time using a different set of initial values v[i] (i=1,...,n). The initial values are all finite. Two cases arise: A- For some sets of initial values mle is giving parameter estimates. B- For some other initial values, mle is reporting the following error: Error in optim(start,f,method=method,hessian=TRUE,...): Initial value in vmin is not finite My aim is to tell R to return the estimates whenever case A, and to return the word Error whenever case B (using an if statement inside a loop). How to tell R to return the word Error whenever mle reports the error given above? Is there a function similar to is.nan which tests the existence of an error? Any assistance would be much appreciated, Regards, Amy - The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England Wales and a charity registered in Scotland (SC 038302). [[alternative HTML version deleted]] __ R-help@r-project.org 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.
Re: [R] Error reporting in R
On 20/10/2008 5:39 AM, A.Noufaily wrote: Hello, I am hoping someone can help me with the following: I am applying the function mle on a single data set X n times, each time using a different set of initial values v[i] (i=1,...,n). The initial values are all finite. Two cases arise: A- For some sets of initial values mle is giving parameter estimates. B- For some other initial values, mle is reporting the following error: Error in optim(start,f,method=method,hessian=TRUE,...): Initial value in vmin is not finite My aim is to tell R to return the estimates whenever case A, and to return the word Error whenever case B (using an if statement inside a loop). How to tell R to return the word Error whenever mle reports the error given above? Is there a function similar to is.nan which tests the existence of an error? Normally an error halts evaluation, but see ?try. The basic pattern is result - try(mle(...)) if (inherits(result, try-error)) return(Error) else return(result) Duncan Murdoch __ R-help@r-project.org 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.
