[R] t.test : extracting Error

[Uwe Ligges]

mogra wrote:
> 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


See ?try

Uwe Ligges

> 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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>