search for: bradleyterry

I don't see the problem with the following... the citations and baseball data work fine, but my simulated data seems to give BTm a headache. What am I missing? --- library(BradleyTerry) library(doBy) ng <- 100 players <- factor( sort( c( "jeff", "mike", "paul", "rich" ) ) ) np <- length( players ) p1 <- factor( c( rep( "jeff", ng ) , rep( levels( players ), np ) ) , levels=players ) p2 <...

How do I install and load the BradleyTerry add on package in R 2.5.1 in MSWindowsXP environment? Kalyan Roy Indian Market Research Bureau (IMRB) International New Delhi, India [[alternative HTML version deleted]]

Dear all, I have carried out a pairwise comparison study that I want to analyze using the BradleyTerry package to establish a rank order of my stimuli. However, BT does not handle ties between stimuli, so I need to find those in my data before I can use that model. The code below goes from the format of my result file(s) to a data frame suitable for BT, but as you can see, there are some ties. I ne...

Hi, I hope some one can help. I need to compute Thurston's case 5 on a large set of data. I have gotten as far as computing the proportional preference matrix but the next math is beyond me. Here us my matrix 0.500 0.472 0.486 0.587 0.366 0.483 0.496 0.434 0.528 0.500 0.708 0.578 0.633 0.554 0.395 0.620 0.514 0.292 0.500 0.370 0.557 0.580 0.615 0.329 0.413 0.422 0.630 0.500 0.783 0.641 0.731

Hello to everyone! I have built CRAN task view for genetics. For now I have not submit it to CRAN yet and it can be accessible from: http://www.bfro.uni-lj.si/MR/ggorjan/software/R/Genetics.html http://www.bfro.uni-lj.si/MR/ggorjan/software/R/Genetics.ctv I have not submitted it to CRAN, since I would like first some opinion about it. Genetics is really so broad field that I belive one person

Hi, I wish to analyze with R the results of a perception experiment in which subjects had to recognize each stimulus among three choices (this was a forced-choice design). The experiment runs under two different conditions and the data is like the following: N1 : count of trials in condition 1 p11, p12, p13: proportions of choices 1, 2, and 3 in condition 1 N2 : count of trials in

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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 competitions so I thought someone might be studying something related already. I presume the rating of a

...* BioPhysConnectoR (1.6-1) Franziska Hoffgaard http://crantastic.org/packages/BioPhysConnectoR Utilities and functions to investigate the relation between biomolecular structures, their interactions, and the evolutionary information revealed in sequence alignments of these molecules. * BradleyTerry2 (0.9-1) Heather Turner http://crantastic.org/packages/BradleyTerry2 Specify and fit the Bradley-Terry model and structured versions * catnet (1.00.0) Nikolay Balov http://crantastic.org/packages/catnet A package that handles discrete Bayesian network models and provides inference...