I have been getting involved with classification trees, and have some questions regarding software.  My data consist of the following:

about 1,000 subjects - likely to increase but not dramatically

about 900 independent or predictor variables - all continuous, some highly correlated, all standardized and approximately normally distributed

outcome which can be dichotomous or categorical, with up to 10 or so categories.

I have been using software from R - both Torsten Hothorn's party package and Therneau and Atkinson's rpart - but these bog down when the tree is not dichotomous

I have investigated Salford System's software, which is very impressive, but expensive, and may be beyond our budget.

I've looked briefly at SPINA


I'd appreciate any advice or references to recent reviews.

Thanks

Peter L. Flom, PhD
Brainscope, Inc.
212 263 7863 (MTW)
212 845 4485 (Th)
917 488 7176 (F)