Prof Ripley, Thank you for your post. Below is the output of traceback(). I'm still not sure what the problem is. Thank you.
4: as.matrix.data.frame(frame) 3: as.matrix(frame) 2: rpart.matrix(m) 1: rpart(lowergi ~ ., data=dset, method="class") On 9/26/07, Prof Brian Ripley <[EMAIL PROTECTED]> wrote: > > On Wed, 26 Sep 2007, Juned Siddique wrote: > > > I'm using rpart to fit a tree using a large dataset: 7000 observations, > 4651 > > variables. All but one of the variables (age) are binary. When I run the > > code: > > > > fit1 <- rpart(lowergi ~ ., data=dset,method="class") > > > > I get the error: > > > > > > Error in dimnames(X) <-list(dn[1L]], unlist(collabs, use.names=FALSE)) : > > Length of `dimnames' [2] not equal to array extent > > > > I have no idea what this error means or what is causing the problem. I'm > > wondering if my dataset is too big, or if there is a problem with how > the > > data are set up. Any help would be appreciated. > > Well, we would appreciate help from you, so please read the footer to this > message. All I can tell you is that the error message did not come from > rpart, but most likely from as.matrix.data.frame (which does contain that > code line, unlike rpart) > > The output of traceback() would have been helpful. The `Writing R > Extensions' manual shows you how to debug a problem like this. > > My best guess is that at least one of those 4651 columns are not suitable > input to rpart. > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > > > -- > Brian D. Ripley, [EMAIL PROTECTED] > Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ > University of Oxford, Tel: +44 1865 272861 (self) > 1 South Parks Road, +44 1865 272866 (PA) > Oxford OX1 3TG, UK Fax: +44 1865 272595 > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
