trueskill (version 0.1)

Parameters: Sets three parameters used in the TrueSkill algorithm.

Description

Class creates an object to hold three parameters used in the TrueSkill algorithm. Passed to AdjustPlayer and Trueskill to perform calculations and update the Player objects or data.

The default parameters object is:

"Parameters [(beta, epilson, gamma)]: [(4.167, 0.74, 0.083)]"

where the default inputs are:

INITIAL_MU = 25.0

INITIAL_SIGMA = INITIAL_MU / 3.0

INITIAL_BETA = INITIAL_SIGMA / 2.0

INITIAL_GAMMA = INITIAL_SIGMA / 100.0

DRAW_PROBABILITY = 0.10

INITIAL_EPSILON = DrawMargin(DRAW_PROBABILITY, BETA)

Usage:

Parameters(beta, epsilon, gamma)

Arguments:

beta

is a measure of how random the game is.

draw_probability

probability that game ends in a draw. Can be calculated from DrawProbability function.

gamma

is a small amount by which a player's uncertainty (sigma) is increased prior to the start of each game.

Examples

  parameters <- Parameters()
  
  # alternatively and equiavelently
  draw_margin <-DrawMargin(draw_probability = 0.10, beta = 25 / 6, total_players = 2)
  parameters <- Parameters(beta = 25 / 6, epsilon = draw_margin, gamma = 25 / 300)