[R] RE: new patched version of randomForest

[Warnes, Gregory R]

The link from
http://cran.r-project.org/src/contrib/PACKAGES.html#randomForest seems to be
broken.   To get the file try 

	http://cran.r-project.org/src/contrib/randomForest_3.3-4.tar.gz

instead.

> -----Original Message-----
> From: Liaw, Andy [mailto:andy_liaw at merck.com]
> Sent: Thursday, September 26, 2002 8:08 PM
> To: 'r-announce at stat.math.ethz.ch'
> Subject: new patched version of randomForest
> 
> 
> 
> There's now a new version of randomForest (3.3-4) on CRAN.  
> Changes from the
> last version include:
> 
> o  "Unsupervised learning" now works again.
> 
> o  Fixed a bug in the original Fortran: the mtry variables chosen 
>    to split each node are now sampled without replacement.
> 
> o  Variable importance for regression now works correctly (i.e.,
>    reproducible when random seed is set).  The problem was simply
>    un-initialized array.  The problem is also in the original
>    Fortran code, so users of that beware!
> 
> o  A new option keep.forest (default TRUE), which, when set to FALSE,
>    supresses the `forest' component of the returned object.  This
>    can reduce memory usage and execution time significantly, if
>    prediction of test set is not needed.
> 
> o  The default value of mtry is now set to sqrt(p) for classification
>    and p/3 for regression (where p is the number of predictors), 
>    consistent with Prof. Breiman's suggestion.
> 
> Questions/comments/bug-reports/patches welcomed!
> 
> Regards,
> Andy
> Andy I. Liaw, PhD
> Biometrics Research          Phone: (732) 594-0820
> Merck & Co., Inc.              Fax: (732) 594-1565
> P.O. Box 2000, RY84-16            Rahway, NJ 07065
> mailto:andy_liaw at merck.com
> 
> 
> 
> 
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