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...nction I've defined that takes a data frame and returns another data frame). What I would like is to do is transform y into a data frame that has columns "StudentID", "Assignment", and the columns in the data frame returned by gapfun. Any ideas? Lorin ---------- Lorin Hochstein Graduate Research Assistant Experimental Software Engineering Group Computer Science Department University of Maryland, College Park

...6 Is this possible to do in R without resorting to a for loop or recursion (i.e. what's the R-ish way to do this?) I know I can use the "diff" function to identify which rows represent a change in activity, but is there anything I can do with that? Lorin ---------- Lorin Hochstein Graduate Research Assistant Experimental Software Engineering Group Computer Science Dept., University of Maryland email:lorin at cs.umd.edu tel:301-405-2721

Hello all, (Apologies in advance if my terminology is incorrect, I'm relatively new to R and statistics). I have data from a factorial design with two treatments (CRF-23), and I'm trying to compute treatment-contrast interactions through analysis of variance. I can't figure out how to do contrasts properly, despite reading the help for "C" and "contrasts"

Hello: I''m trying to put a puppet master on an EC2 instance, and have it be accessible to agentes using either its EC2 DNS name (e.g., ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com) or a friendlier alias (e.g., puppet.example.com). My /etc/puppet/puppet.conf looks like: [master] certname=ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com