Hi, > m <- lm(y~x) # no problem
> allEffects(m)# also no problem model: y ~ x x effect x a b c 3.322448 3.830997 4.969154 > effect("x", m) # ditto x effect x a b c 3.322448 3.830997 4.969154 > Effect("x", m) # ditto x effect x a b c 3.322448 3.830997 4.969154 Best, John ----------------------------------------------- John Fox, Professor McMaster University Hamilton, Ontario, Canada http://socserv.socsci.mcmaster.ca/jfox/ > -----Original Message----- > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Robert > Zimbardo > Sent: Tuesday, August 18, 2015 8:50 PM > To: r-help@r-project.org > Subject: [R] Error message from allEffects(model) / effect(model)" > ‘range’ not meaningful for factors" > > Hi > > I cannot figure out why the effects package throws me error messages > with the following simple code: > > > rm(list=ls(all=TRUE)); set.seed(1); library(effects) > # set up data > x <- factor(rep(letters[1:3], each=100)) > y <- c(rnorm(100, 3, 3), rnorm(100, 4, 3), rnorm(100, 5, 3)) > > > # fit linear model > m <- summary(lm(y~x)) # no problem > > # now the problem > plot(allEffects(m)) > # Error in Summary.factor(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, > : > # ‘range’ not meaningful for factors > plot(effect("x", m)) > # Error in Summary.factor(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, > : > # ‘range’ not meaningful for factors > > > Any ideas? It's go to be something superobvious, but I don't get it. > Thanks, > RZ > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.