Error: package or namespace load failed for ‘car’

Question

I\'m unable to load the car package in R. I tried reinstalling using

install.packages(\"car\",dependencies=TRUE)

both from R and RStudio.

Answer 1

This was just bumped to the homepage by Community. I can't take credit for the answer, but to give it a real non-comment answer:

You should upgrade R first. Then run update.packages(checkBuilt = TRUE). Finally, try again install.packages("car", dependencies=TRUE). If it doesn't work, try to install package pbkrtest first. - user3710546

Given that the current version of R at the time the question was posted was 3.2.3, I think that was a good answer.

Answer 2

I got the same error. (I am using R 3.2.2) Please perform the following steps in sequence (after that try to activate installed caret package):

install.packages("lme4", repos="http://cran.rstudio.com/",type = "binary", dependencies=TRUE)
install.packages("nlme", repos="http://cran.rstudio.com/",type = "binary", dependencies=TRUE)
packageurl <- "https://cran.r-project.org/src/contrib/Archive/pbkrtest/pbkrtest_0.4-4.tar.gz" 
install.packages(packageurl, repos=NULL, type="source")

No need to upgrade R. I am still using R 3.2.2. I performed these steps and it worked for me.