[R] Two Different Interaction Terms for Mixed Factorial ANOVA in R?

. I'm not sure why there are two group:singleType interaction terms. Any help would be much appreciated! For reference, here is the original aov call: anova.p = aov(data = dat.colSingle, rt ~ (group*singleType) + Error(subj/singleType)) summary(anova.p) Thank you! -- Angela Radulescu

[R] lmer() and "$ operator is invalid for atomic vectors"

Hi all, I am a bit mystified by this error message that I get when I try to apply lmer() to a simple dataset with one between factor (age) and one within factor (item): "$ operator is invalid for atomic vectors" I'll just provide the code, because I don't see where the problem is: library(lme

Re: [R] Installing lme4 package in Windows Vista

that a reasonable answer can be extracted from a given body of > data. > ~ John Tukey > > -Oorspronkelijk bericht- > Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > Namens Angela Radulescu > Verzonden: woensdag 29 juli 2009 1:48 > Aan: r-

[R] Installing lme4 package in Windows Vista

Hi all, I have a problem with package installing in Windows, on my PC machine. The end goal is to be able to use the lme() function. Here's what I did so far: > install.packages("lme4") Warning in install.packages("lme4") : argument 'lib' is missing: using 'C:\Users\Angela\Documents/R/win-lib

[R] Backward logistic regression

Hi, I have performed a binary logistic regression using the glm ( family = binomial("logit") )command on 6 IV's and one DV. I would like to now repeat the regression in backward fashion. What is the easiest way to do so in R? Thanks in advance! Best, Angela [[alternative HTML version de