Hi, This should do it, for details, see ?apply
a <- matrix(rnorm(10000),100,100) t(apply(a, 1, quantile, probs = c(.3, .5))) Basically you apply() the quantile function to each row (the 1, 2 would indicate columns) in the object 'a'. HTH, Josh On Wed, Oct 6, 2010 at 10:20 PM, Takos <zyou...@gmail.com> wrote: > > Simple Question > > I have 100x100 matrix and I want to calculte each row's 30,50% quantile > > ex) > > a=matrix(rnorm(10000),100,100) > quantile(a[1,],c(0.3,0.5)) > quantile(a[2,],c(0.3,0.5)) > . > . > . > . > > > I want get results at once. > > so I try quantile(a[1:100,],c(0.3,0.5)) but I can get what I exactly want. > > How can I calculte that? > > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Quantile-question-tp2966195p2966195.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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.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.
