It would be nice to be able to do quickly and easily what are called "parallel coordinate plots" in Systat. This was the feature that kept me using Systat for years and years. If you have an experimental design with several variables for each of several subjects, the plot consists of one like per subject. The variables are listed along the horizontal axis. Patterns in the data just leap out. Not only differences between variables but also clusters of subjects, correlations, etc. Now this CAN be done NOW in R. I''ve done it. I have, somewhere, the code to produce it, which was based on what Prof. Ripley gave me (I think) in response to an earlier post. In order to do it, though, I had to transform the data from its original layout (one row per subject) to a different one (one row per observation). Often this is necessary anyway (even in Systat), so it isn''t a BIG bother. But it would be NICE to be able to look at a parallel plot right away, before trying anything else. On the other hand, I worry a little that, if all requests like this one found their way into the next version or a later one, it would become bloated and slow (like recent versions of Systat, compared to older ones :) ). So don''t take me too seriously! Jon Baron -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._