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1. Re: summing algorithm (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Tue, 14 Feb 2006 12:07:33 -0700
These are called "partitions". You might start with http://mathworld.wolfram.com/Partition.html, which metions a greedy algorithm for finding these, among other, useful facts. Cheers, Brad Brad Bigge
/archives/html/s-news/2006-02/msg00033.html (8,590 bytes)

2. Re: how to extract entire rows from a data frame based on a index variable? (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 17 Nov 2005 10:37:53 -0700
You could use a combination of sorting (to put the date in order) and then use duplicated() (on the ID), something like df <- data.frame(ID=rep(1:10,rep(2,10)),Date=rep(1:2,10),X=rnorm(20)) df <- sor
/archives/html/s-news/2005-11/msg00045.html (10,075 bytes)

3. Re: Find first consecutive pair in vector (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 7 Jul 2005 09:41:18 -0600
<st1:State w:st="on"><st1:place w:st="on">ind</st1:place></st1:State> <- which(X X[<st1:State w:st="on"><st1:place w:st="on">ind</st1:place></st1:State> + 0:1] # so is NA if condition not satisfied<o
/archives/html/s-news/2005-07/msg00031.html (13,300 bytes)

4. X & Z in lme (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 14 Jul 2005 10:30:52 -0600
I think I'm just hard-headed today... Is there an easy way to get the design matrices (X and Z in standard notation) from a fitted lme object? Thanks, Brad Brad Biggerstaff, Ph.D. (970) 221-6473 ...
/archives/html/s-news/2005-07/msg00089.html (6,621 bytes)

5. Re: Meta-analysis (score: 1)
Author: "Biggerstaff, Brad J." <BKB5@CDC.GOV>
Date: Tue, 18 Jan 2005 13:42:05 -0700
f
/archives/html/s-news/2005-01/msg00089.html (8,655 bytes)

6. Re: random factor (score: 1)
Author: "Biggerstaff, Brad J." <BKB5@CDC.GOV>
Date: Thu, 18 Nov 2004 11:03:55 -0700
f B
/archives/html/s-news/2004-11/msg00114.html (8,913 bytes)

7. Re: crossval()? (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Tue, 1 Jun 2004 09:12:40 -0600
You might also consider crossVal in the S+Resample library, a Research Library of Insightful, available from their website: http://www.insightful.com/downloads/libraries/default.asp Brad Brad Biggers
/archives/html/s-news/2004-06/msg00003.html (9,109 bytes)

8. matched logistic regression (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 18 Sep 2003 13:52:14 -0400
Dear S-news list A few years ago I posted a function, mlogitreg, that is a wrapper function to coxph for doing matched logistic regression. In that function, the matching variable was specified using
/archives/html/s-news/2003-09/msg00121.html (49,076 bytes)

9. Re: ROC (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Mon, 25 Aug 2003 12:07:02 -0400
version of S-Plus and platform? You can download the library written by Beth Atkinson & Doug Mahoney at http://www.mayo.edu/hsr/Sfunc.html A port of this to Windows for S-Plus 6+ is available at Bri
/archives/html/s-news/2003-08/msg00137.html (9,484 bytes)

10. Re: extracting rows of $coefficients by variable name? (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Fri, 23 May 2003 11:17:18 -0400
ow
/archives/html/s-news/2003-05/msg00146.html (9,186 bytes)

11. nested uniroot calls (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 6 Mar 2003 15:12:04 -0500
S-news folks: I know that uniroot does not permit nested calls to itself, as stated on the uniroot help page. I have a need to do this, however, in which I need to find the root of a function that it
/archives/html/s-news/2003-03/msg00049.html (6,800 bytes)

12. spatial glms (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 5 Sep 2002 13:37:46 -0400
Has anyone worked out fitting of spatial generalized linear (and quasi-likelihood) models, say as presented in Gotway and Stroup (JABES, 1997)? I'm specifically interested in this for lattice data. T
/archives/html/s-news/2002-09/msg00023.html (6,677 bytes)

13. Re: fit the MLE of gamma dist (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Mon, 30 Sep 2002 10:38:27 -0400
about the fitdistr function in the MASS library (S-Plus 6.0 for Windows)? Seems to provide a very nice front-end to nlminb, with vcov matrix estimated with vcov.nlminb of MASS: fitdistr(y,dgamma,sta
/archives/html/s-news/2002-09/msg00212.html (13,684 bytes)

14. covariance structure for lme (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 15 Aug 2002 12:58:02 -0400
Has anyone written (and would be willing to share) an Unstructured %Kroneker Product% AR(1) covariance structure for use with lme? S-Plus Pro 6.1 for Windows 2000. Thanks, Brad Brad Biggerstaff, Ph.D
/archives/html/s-news/2002-08/msg00102.html (6,674 bytes)

15. anova.lme (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Thu, 18 Jul 2002 13:48:29 -0400
I've fitted a linear mixed-effects model using lme. Below are two calls to anova (anova.lme, of course) specifying the tests as "sequential" for the first, by default, and "marginal" for the second.
/archives/html/s-news/2002-07/msg00126.html (7,754 bytes)

16. strange trellis behavior (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Tue, 7 May 2002 13:46:37 -0400
S-Plus 6 Professional, Release 2 for Windows on Windows 2000. When I start S-Plus I have .guiFirst load a local library (dvbid6) and put it at the top (position 2) of the search path, though the sam
/archives/html/s-news/2002-05/msg00053.html (7,807 bytes)

17. 2-d filter (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Tue, 16 Apr 2002 17:37:07 -0400
Has anyone written a 2-d version of filter, so that the values z to be smoothed are given at rectangularly arranged locations x and y? Thanks, Brad Brad Biggerstaff, Ph.D. Mathematical Statistician D
/archives/html/s-news/2002-04/msg00124.html (6,554 bytes)

18. trellis troubles in WinV6 (score: 1)
Author: @aris.ss.uci.edu>
Date: Fri, 24 Aug 2001 18:22:05 -0400
Windows 2000; S-Plus 6 for Windows, Release 1. When I try to use xyplot, the function runs without (reported) error, but no plot is generated. I used the S-Plus data frame fuel.frame and tried as giv
/archives/html/s-news/2001-08/msg00196.html (7,179 bytes)

19. trellis troubles in WinV6 resolved (score: 1)
Author: h@insightful.com>
Date: Mon, 27 Aug 2001 17:21:24 -0400
Kind thanks to Bill Dunlap of Insightful for his work resolving my problem with xyplot in S-Plus 6; original post given below. I had incorporated a migrated version of my own library in which I had a
/archives/html/s-news/2001-08/msg00217.html (8,280 bytes)

20. The function "?". (score: 1)
Author: "Biggerstaff, Brad J." <bkb5@cdc.gov>
Date: Wed, 20 Jun 2001 17:08:47 -0400
I recall a few years back someone posted an ammendment to "?" to return the arguments of a function using the call for the function "fun". I couldn't find it in the archives, so I wrote another versi
/archives/html/s-news/2001-06/msg00178.html (12,147 bytes)

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