Displaying 5 results from an estimated 5 matches for "usctmx1106".
2005 Nov 11
0
[Fwd: Re: no package 'Matrix' at the repositories]
...Liaw, Andy <andy_liaw at merck.com>
CC: 'Sean Davis' <sdavis2 at mail.nih.gov>, Spencer Graves
<spencer.graves at pdf.com>, r-help <R-help at stat.math.ethz.ch>, Douglas
Bates <bates at stat.wisc.edu>
References: <39B6DDB9048D0F4DAD42CB26AAFF0AFAFED597 at usctmx1106.merck.com>
Liaw, Andy wrote:
> If you are installing from Windows, the current version of Matrix apparently
> doesn't build automatically on Windows. See:
>
> http://cran.r-project.org/bin/windows/contrib/2.3/check/Matrix-check.log
>
> (That's for R-devel. There...
2009 Apr 13
2
Random Forests Variable Importance Question
I am trying to use the random forests package for classification in R.
The Variable Importance Measures listed are:
-mean raw importance score of variable x for class 0
-mean raw importance score of variable x for class 1
-MeanDecreaseAccuracy
-MeanDecreaseGini
Now I know what these "mean" as in I know their definitions. What I
want to know is how to use them.
What I am trying to
2006 Mar 08
0
survival
...w, Andy" <andy_liaw at merck.com>
Subject: Re: [R] reading in only one column from text file
To: "'mark salsburg'" <mark.salsburg at gmail.com>,
R-help at stat.math.ethz.ch
Cc: r-help at stat.math.ethz.ch
Message-ID:
<39B6DDB9048D0F4DAD42CB26AAFF0AFAFED8DA at usctmx1106.merck.com>
Content-Type: text/plain
read.table("datafile", colClasses=c("NULL", "numeric"), ...)
or something like that.
Andy
From: mark salsburg
>
> How do I manipulate the read.table function to read in only
> the 2nd column???
>
> [[alterna...
2008 Oct 15
0
R-help Digest, Vol 67, Issue 31
...quot;Liaw, Andy" <andy_liaw at merck.com>
Subject: Re: [R] ariable Importance Measure in Package RandomForest
To: <linuxkaffee at gmx.net>
Cc: r-help at r-project.org, Uwe Ligges <ligges at statistik.tu-dortmund.de>
Message-ID:
<39B6DDB9048D0F4DAD42CB26AAFF0AFA063CFF24 at usctmx1106.merck.com>
Content-Type: text/plain; charset="us-ascii"
The randomForest package is based on Breiman & Cutler's original code,
which grows trees using the CART algorithm. The Gini criterion for
splitting nodes is hard-coded in the Fortran. If you want info gain as
measure of...
2009 Jun 01
1
installing sn package
...rom: "Liaw, Andy" <andy_liaw@merck.com>
Subject: Re: [R] Constrained fits: y~a+b*x-c*x^2, with a,b,c >=0
To: "Berwin A Turlach" <berwin@maths.uwa.edu.au>, <amvds@xs4all.nl>
Cc: r-help@r-project.org
Message-ID:
<39B6DDB9048D0F4DAD42CB26AAFF0AFA074CEEBB@usctmx1106.merck.com>
Content-Type: text/plain; charset="us-ascii"
There's also the "nnls" (non-negative least squares) package on CRAN
that might be useful, although I'm puzzled by the negative sign in front
of c in Alex post...
Cheers,
Andy
From: Berwin A Turlach
>
>...