?table e.g., table(your.matrix[,1])
On Sat, Mar 8, 2008 at 3:15 PM, Donna Tucker <[EMAIL PROTECTED]> wrote: > > Hello, > I would like to know how to count the number (cardinality) of a specific > element in a single row of a matrix. At this time I have 30X3 matrix. The > first column is the treatment number for each data point. I would like to > know how many of each treatments are in this matrix. i.e. I want to know > how many 1's are in column 1, how many 2's are in column 1, etc. I found a > couple references to the length function, but I could not make any of them > work. > Thanks, > Donna > _________________________________________________________________ > [[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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.
