R help - Oct 2005 - Efficient ways of finding functions and Breslow-Day test for homogeneity of the odds ratio

Dear all,

I have been trying to find a function to calculate the Breslow-Day test for 
homogeneity of the odds ratio in R. I know the test can be preformed in SAS 
but i was wondering if anyone could help me to perform this in r.

In addition i have the fullrefman file to search for functions in the basic 
R packages, does anyone have any suggestions of an efficient way of 
searching for functions in the other add-on packages on the website?

Thanks in advance

Malcolm

MJ Price, Social Medicine wrote:
> I have been trying to find a function to calculate the Breslow-Day test for
> homogeneity of the odds ratio in R. I know the test can be preformed in SAS
> but i was wondering if anyone could help me to perform this in r.
I don't recall seeing the Breslow-Day test anywhere in an R package, but
the VCD package (available via CRAN) has a function called woolf_test()
to calculate Woolf's test for homogeneity of ORs.

Tim C

On Tue, 2005-10-18 at 14:27 +0100, MJ Price, Social Medicine
wrote:
> Dear all,
> 
> I have been trying to find a function to calculate the Breslow-Day test for
> homogeneity of the odds ratio in R. I know the test can be preformed in SAS
> but i was wondering if anyone could help me to perform this in r.
> 
> In addition i have the fullrefman file to search for functions in the basic
> R packages, does anyone have any suggestions of an efficient way of 
> searching for functions in the other add-on packages on the website?
> 
> Thanks in advance
> 
> Malcolm
RSiteSearch("Breslow"), which will perform a search of the e-mail list
archives and other online documentation, reveals this post:

http://finzi.psych.upenn.edu/R/Rhelp02a/archive/50202.html

which in turn leads to this code:

http://www.math.montana.edu/~jimrc/classes/stat524/Rcode/breslowday.test.r


There is also code for the Woolf test in ?mantelhaen.test

Further searches can be conducted using help.search("Keyword"), which
will search your installed set of packages.

See ?help.search and ?RSiteSearch for more help on these.

HTH,

Marc Schwartz

Try "Breslow OR Breslowday filetype:R -robol" search in Google.

 Jarek 
====================================================\==== 
 Jarek Tuszynski, PhD.                           o / \ 
 Science Applications International Corporation  <\__,|  
 (703) 676-4192                                   ">  \ 
 Jaroslaw.W.Tuszynski at saic.com                     `   \ 



-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of MJ Price, Social
Medicine
Sent: Tuesday, October 18, 2005 9:28 AM
To: r-help at stat.math.ethz.ch
Subject: [R] Efficient ways of finding functions and Breslow-Day test for
homogeneity of the odds ratio

Dear all,

I have been trying to find a function to calculate the Breslow-Day test for
homogeneity of the odds ratio in R. I know the test can be preformed in SAS
but i was wondering if anyone could help me to perform this in r.

In addition i have the fullrefman file to search for functions in the basic
R packages, does anyone have any suggestions of an efficient way of
searching for functions in the other add-on packages on the website?

Thanks in advance

Malcolm

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Marc Schwartz (via MN) <mschwartz@mn.rr.com>
wrote:
> 
> On Wed, 2005-10-19 at 06:47 +1000, Tim Churches wrote:
> > Marc Schwartz (via MN) wrote:
> > 
> > > There is also code for the Woolf test in ?mantelhaen.test
> > 
> > Is there? How is it obtained? The documentation on mantelhaen.test in 
> R
> > 2.2.0 contains a note: "Currently, no inference on homogeneity of
the
> > odds ratios is performed." and a quick scan of the source code
for the
> > function didn't reveal any meantion of Woolf's test.
> > 
> > Tim C
> 
> 
> Review the code in the examples on the cited help page...
> 
> :-)
OK, I see it now, thanks.

Tim C
> 
> HTH,
> 
> Marc