[R] Rating competitors

2006-12-26 Thread Jeff Newmiller
I am looking for hints on how to estimate ratings for competitors in an ongoing pairwise competition using R... my particular area of interest being the game of Go, but the idea of identifying ratings (on a continuous scale) rather than relative rankings seems easily generalized to other

Re: [R] Rating competitors

2006-12-26 Thread Spencer Graves
Have you considered Bradley-Terry models? RSiteSearch(bradley, functions) just returned 31 hits for me. Hope this helps. Spencer Graves Jeff Newmiller wrote: I am looking for hints on how to estimate ratings for competitors in an ongoing pairwise competition using R...

Re: [R] Rating competitors

2006-12-26 Thread Charles C. Berry
There is a substantial literature on 'statistics in sports' and pairwise comparisons are of obvious interest. Here is a starting point: http://www.amstat.org/sections/sis/ You might browse the newsletters posted there. You might enjoy: Bridging Different Eras in Sports by Scott M.

Re: [R] Rating competitors

2006-12-26 Thread Michael Kubovy
I would start with elimination-by-aspects models: ?eba I would read the Tversky 1972 paper (cited on the help page for the eba() function), which is brilliant. Jeff Newmiller wrote: I am looking for hints on how to estimate ratings for competitors in an ongoing pairwise competition using

Re: [R] Rating competitors

2006-12-26 Thread Greg Snow
. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Newmiller Sent: Tuesday, December 26, 2006 10:54 AM To: r-help@stat.math.ethz.ch Subject: [R] Rating competitors I am

Re: [R] Rating competitors

2006-12-26 Thread Jeff Newmiller
Spencer Graves wrote: Have you considered Bradley-Terry models? RSiteSearch(bradley, functions) just returned 31 hits for me. Hope this helps. Spencer Graves Thanks to everyone who responded... this was very helpful. I have a bit of reading and investigation to do. I think