For Python, check out the project "orange": http://www.ailab.si/orange/doc/catalog/Classify/ClassificationTree.htm
Not sure about C++, but OpenDT is in C: http://opendt.sourceforge.net/ Looks like OpenCV has both Python and C++ interface (didn't see Python interace to decision tree, though): http://opencv.willowgarage.com/documentation/cpp/decision_trees.html Andy > -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Wensui Liu > Sent: Saturday, September 04, 2010 5:14 PM > To: noclue_ > Cc: r-help@r-project.org > Subject: Re: [R] Decision Tree in Python or C++? > > for python, please check > http://onlamp.com/pub/a/python/2006/02/09/ai_decision_trees.html > > On Sat, Sep 4, 2010 at 11:21 AM, noclue_ <tim....@netzero.net> wrote: > > > > > > Have anybody used Decision Tree in Python or C++? (or > written their own > > decision tree implementation in Python or C++)? My goal is > to run decision > > tree on 8 million obs as training set and score 7 million > in test set. > > > > I am testing 'rpart' package on a 64-bit-Linux + 64-bit-R > environment. But > > it seems that rpart is either not stable or running out of > memory very > > quickly. (Is it because R is passing everything as copy > instead of as object > > reference?) > > > > Any idea would be greatly appreciated! > > > > Have a nice weekend! > > -- > > View this message in context: > http://r.789695.n4.nabble.com/Decision-Tree-in-Python-or-C-tp2 > 526810p2526810.html > > Sent from the R help mailing list archive at Nabble.com. > > > > ______________________________________________ > > 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. > > > > > > -- > ============================== > WenSui Liu > wens...@paypal.com > statcompute.spaces.live.com > ============================== > > ______________________________________________ > 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. > Notice: This e-mail message, together with any attachme...{{dropped:11}} ______________________________________________ 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.
