[R] t.test : extracting Error

[mogra]

Hi Thanks for the reply.

I implemented your solution to my problem but ...

For some of my column there is not enough data to do t-test so it gives me
error and stops the for loop, is any graceful way to check for error msg and
say ok if there is no $p.value continue to the next column

Once again thx for help.



sata pinal wrote:
> 
> I have two matrix with same dimensions. I want to do t.test using each
> column from 2 different matrix.  
> Row n Column names in both matrix are same. 
>  
> e.g.  
> Matrix1       
> id VC1 VC2 VC3       
> R 1 2 3    
> R1 4 5 6    
> R3 7 8 9   
>  
>  
> Matrix2    
> id VC1 VC2 VC3 
> R 10 11 12 
> R1 13 14 15 
> R3 16 17 18 
>  
> want to do t.test using each column (with same name ) using Matrix1 and
> Matrix2
>  
> for eg t.test(Matrix1$VC1, Matrix2$VC1)$p.value 
>  
> What is the best way to do it. I have dataset with 4000 columns for each
> matrix with same row and column names. 
>  
> Thanks a lot.
>        
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