These functions (rpart, the mvpart wrapper, and summary.rpart) are fairly complex doing many things.
For contributed packages you'd be best served by contacting the author/maintainer. I've CC'd Glenn (the maintainer) here. HTH G On Fri, 2010-02-26 at 13:55 +0000, Wearn, Oliver wrote: > Dear all, > > I'm getting an error in one of the stock examples in the 'mvpart' > package. I tried: > > require(mvpart) > data(spider) > fit3 <- rpart(gdist(spider[,1:12],meth="bray",full=TRUE,sq=TRUE)~water > +twigs+reft+herbs+moss+sand,spider,method="dist") #directly > from ?rpart > summary(fit3) > > ...which returned the following: > > Error in apply(formatg(yval, digits - 3), 1, paste, collapse = ",", > sep = "") : > dim(X) must have a positive length > > This seems to be a problem with the cross-validation, since the > "xerror" and "xstd" columns are missing from the summary table as > well. > > Using the mpart() wrapper results in the same error: > > fit4<-mvpart(gdist(spider[,1:12],meth="bray",full=TRUE,sq=TRUE)~water > +twigs+reft+herbs+moss+sand,spider,method="dist") > summary(fit4) > > Note, changing the 'method' argument to ="mrt" seems, superficially, > to solve the problem. However, when the dependent variable is a > dissimilarity matrix, shouldn't method="dist" be used (as per the > examples)? > > Thanks, in advance, for any help on this error. > > Oliver > ______________________________________________ > 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. -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ 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.
