Thanks, it works.. Regards, Siti
Domenico Vistocco wrote: > > WXE83 wrote: >> Dear all, >> >> I got one problem here and hoping someone can help me on this. Say I have >> a >> 50 by 2 matrix and I don't know how to randomly select: >> > data <- matrix(1:25, 50, 2) >> 1. a pair of observations from the last 10th of the 50 observation from >> the >> matrix. >> > data[sample(41:50, 1, replace=FALSE),] >> 2. how to select randomly an observation from the first 5 observations of >> the second column in the matrix? >> > data[sample(1:5, 1, replace=FALSE),2] > > Ciao, > domenico >> Thanks....hope to hear from someone soon >> > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/How-to-select-randomly-from-a-matrix--tp22410551p22413454.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.
