[R] How to extract x rows to get x pvalues using t.test

From: Jagarlamudi, Choudary <choudary.jagar_at_swosu.edu>
Date: Wed 16 Mar 2005 - 04:59:02 EST


Hi all,  

  My data
genes

     [,1] [,2] [,3] [,4]
[1,] 25 72 23 55
[2,] 34 53 41 33
[3,] 26 43 26 44
[4,] 36 64 64 22
[5,] 47 72 67 34

 stu<-t.test(genes[,1:2],genes[,3:4])
> stu$p.value
[1] 0.4198002

i get 1 pvalue for the entire col1:col2 Vs col3:col4. I am trying to get 5 p values for the 5 rows i have. I am trying to avoid a for loop coz my actual data has 56000 rows and its taking more than 4 minutes to compute.  

Thanks in advance.  

Choudary Jagarlamudi
Instructor
Southwestern Oklahoma State University
STF 254

100 campus Drive
Weatherford OK 73096
Tel 580-774-7136

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