Ranking.Glicko.Types

For examples, see Core and Inference.

Data types

data Player

Data type representing a player's Glicko rating.

(NOTE: The system assumes Glicko ratings, to convert to Glicko-2 , use oldToNew)

Constructors

Player

Fields

• _pid :: PlayerId

  Player id, can be anything

• _rating :: Double

  Rating

• _dev :: Double

  Deviation

• _vol :: Double

  Volatility

• _inactivity :: Int

  Inactivity (not part of Glicko-2), keeps track of the number of rating updates a player has been inactive.

• _age :: Int

  Age (not part of Glicko-2), keeps track of the number of rating updates since the player was added.

Instances

Eq Player

Methods

(==) :: Player -> Player -> Bool

(/=) :: Player -> Player -> Bool

Show Player

Methods

showsPrec :: Int -> Player -> ShowS

show :: Player -> String

showList :: [Player] -> ShowS

NFData Player

Methods

rnf :: Player -> ()

data Match

Constructors

Match

Fields

• _pla :: PlayerId
• _plb :: PlayerId
• _sca :: Score
• _scb :: Score

Instances

Eq Match

Methods

(==) :: Match -> Match -> Bool

(/=) :: Match -> Match -> Bool

Show Match

Methods

showsPrec :: Int -> Match -> ShowS

show :: Match -> String

showList :: [Match] -> ShowS

type PlayerId = Int

type Score = Int

newtype ScoreFunction

ScoreFunctions are used in compute to evaluate two players performances against eachother. It should obey the following laws,

0 <= compareScores x y

1 >= compareScores x y

compareScores x y == 1 - compareScores y x

The default implementation is

\s1 s2 -> case s1 `compare` s2 of
            LT -> 0
            EQ -> 0.5
            GT -> 1

Constructors

ScoreFunction

Fields

• compareScores :: Score -> Score -> Double

Instances

Show ScoreFunction

Methods

showsPrec :: Int -> ScoreFunction -> ShowS

show :: ScoreFunction -> String

showList :: [ScoreFunction] -> ShowS

Default ScoreFunction

Methods

def :: ScoreFunction

data GlickoSettings

Provides the compute function with parameters. See http://glicko.net/glicko/glicko2.pdf for an explanation.

(NOTE: scoreFunction is not a part of Glicko-2)

The default settings are as defined in the above paper.

Constructors

GlickoSettings

Fields

• initialRating :: Double
• initialDeviation :: Double
• initialVolatility :: Double
• tau :: Double
• scoreFunction :: ScoreFunction

Instances

Show GlickoSettings

Methods

showsPrec :: Int -> GlickoSettings -> ShowS

show :: GlickoSettings -> String

showList :: [GlickoSettings] -> ShowS

Default GlickoSettings

Methods

def :: GlickoSettings

Lenses

Player

pid :: Lens' Player PlayerId

rating :: Lens' Player Double

dev :: Lens' Player Double

vol :: Lens' Player Double

inactivity :: Lens' Player Int

age :: Lens' Player Int

Match

pla :: Lens' Match PlayerId

plb :: Lens' Match PlayerId

sca :: Lens' Match Score

scb :: Lens' Match Score