[R] How to get standard deviation of rows in a matrix

From: Jagarlamudi, Choudary <choudary.jagar_at_swosu.edu>
Date: Thu 10 Mar 2005 - 06:49:44 EST


Hi all,  

   I am trying to find sd of my rows in a matrix and i get column sd inspite of extracting rows. I tried to do the sqrt(var(x)) but that did'nt work as well,  

Here is my data  

genes
15 24 63 40
25 42 46 35
23 53 37 45
30 37 50 55
40 51 30 48  

x<-sd(genes[1:5,])  

y<-sqrt(var(genes[1:5,]))  

I get 4 sds for the 4 columns instead of 5 sds for my 5 rows. Thanks you 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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