Perhaps like this: diag(mat[data$row, data$column]) <- data$height
On 29/01/2008, Gator Connection <[EMAIL PROTECTED]> wrote: > > I am a beginner and this is a naive question. > I have the following data set. > row column height > 1 2 96 > 3 7 67 > 9 25 77 > ...... > I have a matrix of 50*100 data points and about 60% of them are zeros. > I want to put the height data into the matrix according to their row and > column numbers. does anybody have experience in setting up such matrix? > Your help is highly appreciated. > Jack > LSU > _________________________________________________________________ > [[elided Hotmail spam]] > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
