[R] Resolution of problem re location polr and of MASS

[Peter Flom]

First, my apologies for not giving all the details in my first post.  

Second, the problem was somewhat more complicated than simply using
help.search('polr') or library(MASS).  When I tried these, I got
notices that polr could not be found anywhere, and that no package
called MASS existed.  When I went to the  CRAN site, there was no
package called MASS.  I am not sure how I installed R 1.8.1 on a Windows
machine without installing MASS and without getting any errors, but I
did.

Third, thanks to all who replied, and especially to Andy Jaworski who
showed me how to solve the problem, namely to get the package VR from
CRAN and then type library(MASS).  

Thanks again, 

Peter

Peter L. Flom, PhD
Assistant Director, Statistics and Data Analysis Core
Center for Drug Use and HIV Research
National Development and Research Institutes
71 W. 23rd St
www.peterflom.com
New York, NY 10010
(212) 845-4485 (voice)
(917) 438-0894 (fax)