R help - Mar 2012 - ignore error getting next result

Dear All,
 
How do I ignore an error and still getting result of next iteration.
I am trying to do wilcox.test on a loop, when the test fail, I would like to
continue doing the next iteration and getting the p-value.
I tried to do tryCatch or try but I cannot retrieve the p-value if the test is
not fail.
 
sample code:

test2=list(numeric(0),c(10,20));
test1=list(c(1),c(1,2,3,4));
for (i in 1:2){
 wtest=wilcox.test(test1[[i]],test2[[i]])
}
 
i=1 will fail, I want to ignore this and get the pvalue for i=2.
 
Thanks,
Lin 		 	   		  
	[[alternative HTML version deleted]]

On Mar 27, 2012, at 12:56 PM, C Lin wrote:
>
> Dear All,
>
> How do I ignore an error and still getting result of next iteration.
> I am trying to do wilcox.test on a loop, when the test fail, I would  
> like to continue doing the next iteration and getting the p-value.
> I tried to do tryCatch or try but I cannot retrieve the p-value if  
> the test is not fail.
>
> sample code:
>
> test2=list(numeric(0),c(10,20));
> test1=list(c(1),c(1,2,3,4));
> for (i in 1:2){
> wtest=wilcox.test(test1[[i]],test2[[i]])
> }
>
> i=1 will fail, I want to ignore this and get the pvalue for i=2.
Please read the FAQ entry And you would be advise to read through the  
rest of the FAQ as well.

http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-capture-or-ignore-errors-in-a-long-simulation_003f

>
> Thanks,
> Lin 		 	   		
> 	[[alternative HTML version deleted]]
>
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