Displaying 2 results from an estimated 2 matches for "duhray".
2004 Mar 03
7
Location of polr function
...t 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 100...
2003 Dec 19
1
Question re labels in r-part (continuation of a thread from a while back)
...", and the original DV is not on that
frame.
So, I tried the following:
{create the tree}
tr.totpart <- rpart(log(totpart +1) ~ sexfact + age + windle +
eabused
+ as.factor(pabau) + positive + controlling + lenient +
druguse.ever
+ anycsw,
xval = 10, cp = 0.000000001, data = duhray)
{prune the tree}
tr.totpart.pruned <- prune (tr.totpart, cp = .02)
{ad the original metric to the frame}
meanpart <- exp(tr.totpart.pruned$frame$yval)-1
tr.totpart.pruned$frame <- cbind(tr.totpart.pruned$frame, meanpart)
and thought this was good because summary(tr.totpart.pruned...