H all, I have a 6 x 3 matrix. The last column is simply the sum of of the first two rows.
x1 x2 x3 1 2 3 2 1 3 1 0 1 2 2 4 2 1 3 2 1 3 0 0 0 I want to create a column of probabilities p, such that for each row, I want to find the probability of x1=k and x3 = n divided by the probability that x3 = n. So I should end up with a column of probabilities: 1/4, 3/4, 1/7, 1/7, 3/4, 3/4, 1/7 -- Thanks, Jim. [[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.