"car" package url out of date

Question

I am trying to follow along in the Statistical Sleuth here to teach myself some regression analysis for my job in machine learning, but when installing the "mosaic" package it requires the "car" package. So I did install.packages(car) but I see that the url R is trying to open is

http://cran.rstudio.com/bin/windows/contrib/3.1/car_2.0-20.zip

However, the correct url (as seen here) is

http://cran.r-project.org/bin/windows/contrib/3.1/car_2.0-21.zip

How can I make R open a custom url and install this package?

Answer 1

I just looked at update.packages(), and there's an update for the car package.

> update.packages()
#  ...
# car :
#  Version 2.0-20 installed in /home/richard/R/x86_64-pc-linux-gnu-library/3.1 
#  Version 2.0-21 available at http://cran.rstudio.com
Update (y/N/c)?  

Entering y, the URL in question appears in the download message

Update (y/N/c)?  y
# trying URL 'http://cran.rstudio.com/src/contrib/car_2.0-21.tar.gz'
# Content type 'application/x-gzip' length 584149 bytes (570 Kb)
# opened URL
# ==================================================
# downloaded 570 Kb

So I would probably install car first, then try mosaic