[R] Location of polr function

[Liaw, Andy]

help.search() is your friend:

polr(MASS)               Proportional Odds Logistic Regression

HTH,
Andy

> From: Peter Flom
> 
> Hello
> 
> I am running R 1.8.1 on a  Windows platform
> 
> I am attempting to fit an ordinal logistic regression model, using the
> polr function, as described in Venables and Ripley.  But when I try
> 
> model4 <- polr(ypsxcat~committed + as.factor(sex)
>  + as.factor(drugusey) + anycsw + as.factor(sex)*committed
>   + as.factor(sex)*as.factor(drugusey)+as.factor(sex)*anycsw, data =
> duhray)
> 
> I get a message that the polr function was not found.  
> 
> Any help appreciated
> 
> thanks
> 
> 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)
> 
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