> 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 [EMAIL PROTECTED] 801.408.8111 > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > project.org] On Behalf Of Alex99 > Sent: Wednesday, October 15, 2008 11:17 AM > To: r-help@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@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. ______________________________________________ R-help@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.
