[R] how to ignore error messages?

[Xiaohui]

see ?try

Jianping Jin wrote:
> Dear group:
>
> I wrote a code to iterate a non-linear fit with a set of data. The entire 
> process didn't implemented to the end because an error message, "singular 
> gradient". I knew that some sub-sets (columns) do not fit my formula well 
> and may result in parameters going to infinity. It is pretty hard to remove 
> those sub sets before running the code since that will take a lot of time.
>
> I added some logic assessments prior to running nonlinear fit. It helped 
> but some exceptions still existed. I am wondering if there is any way in R 
> by which I can continue to run the entire code to the end by ignoring the 
> error message?
>
> Greatly appreciate your help,
>
> Jianping
>
> ##################################
> Jianping Jin Ph.D.
> Bioinformatics scientist
> Center for Bioinformatics
> Room 3133 Bioinformatics building
> CB# 7104
> University of Chapel Hill
> Chapel Hill, NC 27599
> Phone: (919)843-6105
> FAX:   (919)843-3103
> E-Mail: jjin at email.unc.edu
>
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