On Tue, 18 Oct 2005, Hades wrote: > Hi there, > > I am growing classification trees using the 'tree' package add-on to R. > > I would like to convert the 'R' output to the SAS format used by Salford > Systems' commercial CART software in order to interface with some > other software. > > My question is:
> How can I parse the R tree data structure in order to infer the tree > structure? The 'tree' class has a member '$frame' which gives the > splits at each node, but as far as I can see does not specify the > daughter nodes. Is this information accessible through the interface to > class 'tree' or do I need to dive into the C code? The daughter nodes of n are 2n and 2n+1. The print method, print.tree, is written entirely in R and shows you how to parse the tree (and you can see the pattern of the numbers from its result). -- 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 ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
