[R] way to check if the evaluation of an expression returns an error?
A.Robinson at ms.unimelb.edu.au
Fri Dec 14 23:33:36 CET 2007
On Fri, Dec 14, 2007 at 02:10:52PM -0800, Thomas Pujol wrote:
> Is there a recommended or "good" way to check if the evaluation of an expression returns an error?
> I wish var(NA) to return NA or "err", or some other value, even a text-string, but not an error message.
> I am using a loop to load many samples of data and to perform analysis on each sample. On occasion, the function I execute returns an error message. (e.g. when all data is NA, etc). I wish for the loop to continue to execute, and to have the function return an NA or NULL rather then an error message.
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