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https://github.com/avitex/elixir-glicko
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Add e to results
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@ -26,12 +26,14 @@ defmodule Glicko do
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defp do_new_rating(player = %Player{version: :v2}, results, sys_constant) do
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results = Enum.map(results, fn result ->
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opponent = Player.to_v2(result.opponent)
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%{
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score: result.score,
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opponent: opponent,
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opponent_rating_deviation_g: calc_g(opponent.rating_deviation),
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}
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result =
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Map.new
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|> Map.put(:opponent, Player.to_v2(result.opponent))
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|> Map.put(:score, result.score)
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result = Map.put(result, :opponent_rating_deviation_g, calc_g(result.opponent.rating_deviation))
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result = Map.put(result, :e, calc_e(player, result))
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result
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end)
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ctx =
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@ -74,11 +76,10 @@ defmodule Glicko do
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end
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# Calculation of the estimated variance of the player's rating based on game outcomes
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defp calc_variance_estimate(%{player: player, results: results}) do
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defp calc_variance_estimate(%{results: results}) do
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results
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|> Enum.reduce(0.0, fn result, acc ->
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tmp_e = calc_e(player, result)
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acc + :math.pow(result.opponent_rating_deviation_g, 2) * tmp_e * (1 - tmp_e)
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acc + :math.pow(result.opponent_rating_deviation_g, 2) * result.e * (1 - result.e)
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end)
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|> :math.pow(-1)
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end
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@ -102,9 +103,9 @@ defmodule Glicko do
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:math.exp(a / 2)
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end
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defp calc_results_effect(%{player: player, results: results}) do
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defp calc_results_effect(%{results: results}) do
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Enum.reduce(results, 0.0, fn result, acc ->
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acc + result.opponent_rating_deviation_g * (result.score - calc_e(player, result))
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acc + result.opponent_rating_deviation_g * (result.score - result.e)
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end)
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end
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