Re: [R] Decision Tree in Python or C++?

2010-09-08 Thread Liaw, Andy 
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.

Re: [R] Decision Tree in Python or C++?

2010-09-04 Thread Wensui Liu 
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-tp2526810p2526810.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.