Jagarlamudi, Choudary wrote on 3/9/2005 1:49 PM:
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.
This has come up several times in the past and a quick search of the archives would have lead you to:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/34169.html
HTH, --sundar
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