[R] "try-error" can not be test. Why?

[David Winsemius]

On Sep 8, 2010, at 1:18 PM, telm8 wrote:

>
> Hi,
>
> I am having some strange problem with detecting "try-error". From  
> what I
> have read so far the following statement:
>
>
> try( log("a") ) == "try-error"
>
>
> should yield TRUE, however, it yields FALSE. I can not figure out  
> why. Can
> someone help?
>

 > class(try( log("a"), silent=TRUE )) == "try-error"
[1] TRUE




> Many thanks
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David Winsemius, MD
West Hartford, CT