[19219] in s-news-athena
Re: [S] Results: weighted histogram, AND bootstrap code
daemon@ATHENA.MIT.EDU (Tim Hesterberg)
Tue Sep 14 11:09:40 1999
Date: Tue, 14 Sep 1999 08:02:48 -0700 (PDT)
Message-Id: <199909141502.IAA11396@quake.statsci.com>
From: Tim Hesterberg <timh@statsci.com>
To: s-news@wubios.wustl.edu
Cc: christian.hoffmann@lagonda.wsl.ch
In-Reply-To: <3.0.5.32.19990914143247.009fbb50@mail.wsl.ch> (message from
Christian Hoffmann on Tue, 14 Sep 1999 14:32:47 +0200)
Reply-To: timh@statsci.com (Tim Hesterberg)
Christian Hoffman summarized responses he received regarding
weighted histograms, including:
>2) Tim Hesterberg <timh@statsci.com>, MathSoft wrote: "I have code that does
>weighted histograms, calling a weighted version of the C function
>tabulate", see http://www.statsci.com/Hesterberg/tilting/
Please contact me if you are interested in testing the code.
That web address will no longer work.
The code is part of a package of software for an NSF-funded
project in bootstrap tilting inferences, and includes:
* New functions implementing bootstrap tilting methods for
diagnostics and confidence intervals. The big attraction of
the latter is speed -- they appear to be more accurate with 100
bootstrap replications than is the BCa interval with 2000 replications.
* Replacements for all the existing bootstrap functions in
S-PLUS (versions 4.0, 4.1, 4.5, S+2000). These replacements
add capabilities and fix bugs.
This code was not previously available to S+3.4 users; if
that includes you I believe you'll be pleased with the ease of use
of this code.
* New functions and updated versions of various S-Plus functions,
such as mean(), cor(), var(), quantile(), colMeans(), hist(), etc.,
that allow weights and add other capabilities.
The code is in alpha test form, and is available for S+2000 and S+3.4.
Please contact me if you are interested in testing the code.
While I am happy to have people use the code, I must know who is
testing it so that I can get feedback and let you know if problems
are found. If you downloaded the code before I moved the web site,
please let me know that you are testing it.
========================================================
| Tim Hesterberg Research Scientist |
| timh@statsci.com MathSoft, Inc. |
| (206)283-8802x319 1700 Westlake Ave. N, Suite 500 |
| (206)283-0347 (fax) Seattle, WA 98109-3044, U.S.A. |
| www.statsci.com/Hesterberg |
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