Hello, I have several data sets involving repeated measures over time of annual grass survival in plots following application of several levels of herbicide treatments. Since the data set contains quite a number of zeros, it doesn't fit the assumptions for parametric analysis. I read in Shah, D.A. and L. V. Madden. 2004. Nonparametric analysis of ordinal data in designed factorial experiments. Am. Phytopathological Soc. 94:1 pp 33-43. that free macros exist for this analysis in SAS and R. I've looked through the R packages and searched the R mailing list; however, I can't seem to find what I'm looking for. Perhaps, I'm looking in the wrong place. I would appreciate it if someone would point me in the right direction. Thanks, Gary Whysong Department of Applied Biological Sciences Arizona State University East