row-wise means

Tena koe Anjan

?rowMeans
?apply

You'll need to subset your data matrix to exclude the first column
(e.g., yourData[,-1]).

HTH ....

Peter Alspach
-----Original Message-----
From: r-help-bounces at r-project.org 
[mailto:r-help-bounces at r-project.org] On Behalf Of ANJAN PURKAYASTHA
Sent: Thursday, 19 November 2009 11:28 a.m.
To: r-help at r-project.org
Subject: [R] row-wise means

I have a dataframe with 3 columns. The first column stores an 
index. I would like to calculate the mean of the numbers 
stored in each of the rest of the columns.
So,
here is my data matrix:
col1 col2 col3
1 23 34
2 45 56
3 23 56
4 34 68

For each row I would like to calculate the means of the 
numbers stored in
col2 and col3.
How can this be done in R?
TIA,
Anjan

--
=============================
anjan purkayastha, phd
bioinformatics analyst
whitehead institute for biomedical research nine cambridge 
center cambridge, ma 02142

purkayas [at] wi [dot] mit [dot] edu
703.740.6939

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row-wise means

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