Package: winning
Type: Package
Title: Contest Win Probabilities and Ability Calibration
Version: 0.3.0
Authors@R: person("Peter", "Cotton", email = "peter.cotton@microprediction.com",
    role = c("aut", "cre"))
Description: Solves the horse race problem in both directions. Infers
        relative ability from win probabilities (or betting dividends)
        for contests whose entrants share a common performance
        distribution, with dead heats handled exactly, by the lattice
        fixed-point algorithm of Cotton (2021)
        <doi:10.1137/19M1276261>. Also computes all N win probabilities
        of a factor-structured Gaussian race (multinomial probit with
        low-rank-plus-diagonal covariance) in one shared-lattice pass
        of O(Q*N*L) operations, and inverts observed shares to
        abilities by a damped Newton method with analytic slopes. A
        dependency-free base-R port of the reference python package
        'winning'. Performances are times: lowest wins.
License: MIT + file LICENSE
Encoding: UTF-8
URL: https://github.com/microprediction/winning
BugReports: https://github.com/microprediction/winning/issues
Suggests: mvtnorm, testthat (>= 3.0.0)
Config/testthat/edition: 3
RoxygenNote: 7.3.0
NeedsCompilation: no
Packaged: 2026-10-11 15:56:25 UTC; root
Author: Peter Cotton [aut, cre]
Maintainer: Peter Cotton <peter.cotton@microprediction.com>
Repository: https://microprediction.r-universe.dev
Date/Publication: 2026-09-09 16:30:02 UTC
RemoteUrl: https://github.com/cran/winning
RemoteRef: HEAD
RemoteSha: acfb360e262195ee80f8785d75e8cc6f90cd393e