Hi everyone, I have just started using R, and I have a simple question. How can I get the Standard deviation for rows. basically I am looking for something like "rowMeans()" but for Standard deviation (I tried "rowSds()" didn't exist) Thanks, -- View this message in context: http://www.nabble.com/Standard-deviation-for-rows-tp19998106p19998106.html Sent from the R help mailing list archive at Nabble.com.
?apply
e.g. apply(matrix,1,sd)
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Alex99
Sent: Wednesday, October 15, 2008 1:17 PM
To: r-help at r-project.org
Subject: [R] Standard deviation for rows
Hi everyone,
I have just started using R, and I have a simple question.
How can I get the Standard deviation for rows. basically I am looking
for
something like "rowMeans()"
but for Standard deviation (I tried "rowSds()" didn't exist)
Thanks,
--
View this message in context:
http://www.nabble.com/Standard-deviation-for-rows-tp19998106p19998106.ht
ml
Sent from the R help mailing list archive at Nabble.com.
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> apply( mymatrix, 1, sd )Will give the row standard deviations of a matrix or matrix like data frame. There are also some functions in add-on packages that do row sd's or var's. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.snow at imail.org 801.408.8111> -----Original Message----- > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- > project.org] On Behalf Of Alex99 > Sent: Wednesday, October 15, 2008 11:17 AM > To: r-help at r-project.org > Subject: [R] Standard deviation for rows > > > Hi everyone, > > I have just started using R, and I have a simple question. > How can I get the Standard deviation for rows. basically I am looking > for > something like "rowMeans()" > but for Standard deviation (I tried "rowSds()" didn't exist) > > Thanks, > -- > View this message in context: http://www.nabble.com/Standard-deviation- > for-rows-tp19998106p19998106.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code.
Take a look on the package bellow. rowSds, colSds and much more.> install.packages("matrixStats")-- View this message in context: http://www.nabble.com/Standard-deviation-for-rows-tp19998106p24827130.html Sent from the R help mailing list archive at Nabble.com.