Thanks to both of you for replying. Actually, I first wrote Mark, but he had a vacation mail message saying he'll be away until the 22nd, and I wanted my students to be able to use this debugging tool before then.
R-2.5.0-patched did indeed solve the problem. Thanks. By the way, I have (yet another) R tutorial/reference page, at http://heather.cs.ucdavis.edu/~matloff/r.html Norm Matloff Dept. of Computer Science (formerly in the Dept. of Statistics) University of California, Davis ______________________________________________ R-help@stat.math.ethz.ch 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.
