compute_iterative_ratings: Internal function to compute iterative ratings

In comperank: Ranking Methods for Competition Results

Description

C++ implementation of iterative computations.

Usage

compute_iterative_ratings(rate_fun, player1_id, score1, player2_id, score2,
  initial_ratings)

Arguments

rate_fun	Rating function (see Details).
player1_id	Integer vector of player1 identifiers.
score1	Numeric vector of player1 score in games.
player2_id	Integer vector of player2 identifiers.
score2	Numeric vector of player2 score in games.
initial_ratings	Numeric vector of initial ratings (see Details).

Details

rate_fun - function that takes arguments:

• rating1 - rating of player1 before game;

• score1 - numeric score of player1 in the game;

• rating2 - rating of player2 before game;

• score2 - numeric score of player2 in the game.

This function should return numeric vector of length 2: rating of player1 and player2 after the game.

player1_id, player2_id - integer vectors of identifiers of players in a form of increasing numbers (1, 2, ...). Identifier 0 is reserved for 'ghost' player. His/her rating is taken as current rating of opponent. For two 'ghost' players ratings before and after are 0.

initial_ratings - numeric vector of length equal to number of unique players in player1_id and player2_id. In initial_ratings[player_id - 1] (indexing from zero) initial rating of player with identifier 'player_id' is stored.

Value

A list:

• rating1Before - rating of player 1 before the game;

• rating2Before - rating of player 2 before the game;

• rating1After - rating of player 1 after the game;

• rating2After - rating of player 2 after the game.

comperank documentation built on March 26, 2020, 6:04 p.m.