From owner-chemistry@ccl.net Sun Aug 31 09:53:01 2014
From: "John McKelvey jmmckel : gmail.com" <owner-chemistry*_*server.ccl.net>
To: CCL
Subject: CCL: Robust regression analysis
Message-Id: <-50457-140831095056-29835-4lyz0IBpZeA9BL59XgYnyQ*_*server.ccl.net>
X-Original-From: John McKelvey <jmmckel . gmail.com>
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Sent to CCL by: John McKelvey [jmmckel ~~ gmail.com]
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Folks,

Could anyone point me to a code for computing robust regression analysis
using Tukey Biweights?

Many thanks,

John

-- 
John McKelvey
10819 Middleford Pl
Ft Wayne, IN 46818
260-489-2160
jmmckel(~)gmail.com

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<div dir="ltr"><div><div><div>Folks,<br><br></div>Could anyone point me to a code for computing robust regression analysis using Tukey Biweights?<br><br></div>Many thanks,<br><br></div>John<br clear="all"><div><div><div><div>
<br>-- <br>John McKelvey<br>10819 Middleford Pl<br>Ft Wayne, IN 46818<br>260-489-2160<br><a href="mailto:jmmckel(~)gmail.com">jmmckel(~)gmail.com</a>
</div></div></div></div></div>

--001a11351f02a0f0d80501ed2cd8--


From owner-chemistry@ccl.net Sun Aug 31 11:20:00 2014
From: "Rajarshi Guha rajarshi.guha\a/gmail.com" <owner-chemistry-x-server.ccl.net>
To: CCL
Subject: CCL: Robust regression analysis
Message-Id: <-50458-140831111834-1091-Y9hWNwgDdo39wiKgbKz+LQ-x-server.ccl.net>
X-Original-From: Rajarshi Guha <rajarshi.guha-.-gmail.com>
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Date: Sun, 31 Aug 2014 11:18:28 -0400
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Sent to CCL by: Rajarshi Guha [rajarshi.guha~~gmail.com]
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If you use R, the rlm method in the MASS package will do this

http://stat.ethz.ch/R-manual/R-patched/library/MASS/html/rlm.html


On Sun, Aug 31, 2014 at 9:50 AM, John McKelvey jmmckel : gmail.com <
owner-chemistry(-)ccl.net> wrote:

> Folks,
>
> Could anyone point me to a code for computing robust regression analysis
> using Tukey Biweights?
>
> Many thanks,
>
> John
>
> --
> John McKelvey
> 10819 Middleford Pl
> Ft Wayne, IN 46818
> 260-489-2160
> jmmckel|gmail.com
>



-- 
Rajarshi Guha | http://blog.rguha.net
NIH Center for Advancing Translational Science

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<div dir=3D"ltr">If you use R, the rlm method in the MASS package will do t=
his<div><br></div><div><a href=3D"http://stat.ethz.ch/R-manual/R-patched/li=
brary/MASS/html/rlm.html">http://stat.ethz.ch/R-manual/R-patched/library/MA=
SS/html/rlm.html</a><br>
</div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">O=
n Sun, Aug 31, 2014 at 9:50 AM, John McKelvey jmmckel : <a href=3D"http://g=
mail.com">gmail.com</a> <span dir=3D"ltr">&lt;<a href=3D"mailto:owner-chemi=
stry(-)ccl.net" target=3D"_blank">owner-chemistry(-)ccl.net</a>&gt;</span> wrot=
e:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><div><div>Folks,<br><b=
r></div>Could anyone point me to a code for computing robust regression ana=
lysis using Tukey Biweights?<br>
<br></div>Many thanks,<br><br></div>John<span class=3D"HOEnZb"><font color=
=3D"#888888"><br clear=3D"all"><div><div><div><div>
<br>-- <br>John McKelvey<br>10819 Middleford Pl<br>Ft Wayne, IN 46818<br><a=
 href=3D"tel:260-489-2160" value=3D"+12604892160" target=3D"_blank">260-489=
-2160</a><br><a href=3D"mailto:jmmckel%7Cgmail.com" target=3D"_blank">jmmck=
el|gmail.com</a>
</div></div></div></div></font></span></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>Rajarshi Guh=
a | <a href=3D"http://blog.rguha.net" target=3D"_blank">http://blog.rguha.n=
et</a><br>NIH Center for Advancing Translational Science<br>
</div>

--089e013c5b7cfe1d060501ee6512--


From owner-chemistry@ccl.net Sun Aug 31 11:54:00 2014
From: "Geoffrey Hutchison geoffh(0)pitt.edu" <owner-chemistry^server.ccl.net>
To: CCL
Subject: CCL: Robust regression analysis
Message-Id: <-50459-140831114809-26554-RtUHdgPHJRAIkBfWgbV7TA^server.ccl.net>
X-Original-From: Geoffrey Hutchison <geoffh,+,pitt.edu>
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Date: Sun, 31 Aug 2014 11:48:00 -0400
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Sent to CCL by: Geoffrey Hutchison [geoffh]^[pitt.edu]

> Could anyone point me to a code for computing robust regression analysis using Tukey Biweights?

I'd suggest looking through the various R packages for robust regression - there are several. Undoubtedly someone has implemented that:

http://cran.r-project.org/web/packages/available_packages_by_name.html

Indeed a Google search for "r package turkey biweights" returns several promising suggestions.

Hope that helps,
-Geoff

---
Prof. Geoffrey Hutchison
Department of Chemistry
University of Pittsburgh
tel: (412) 648-0492
email: geoffh:+:pitt.edu
web: http://hutchison.chem.pitt.edu/