[EMAIL PROTECTED] wrote: > I'd like to compare length-weight regressions among years. Any information > would be appreciated. > > a. gray > fisheries consultant
Your message is rather cryptic for a general statistical audience, whereas I'm sure in a fisheries group everybody would understand what you want. Use a glm with family=Gaussian(link=log) for all data sets together (in original units) with year as a factor, then run the model again ignoring the year factor, and compare the different fits using anova(name of your glm objects) for a likelihood ratio test, or inspect the AICs for a non-frequentist model selection method. R. ______________________________________________ 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.
