elo.model.frame

A helper function to create the <code>model.frame</code> for many <code>elo</code> functions.

A flexible framework for calculating Elo ratings and resulting
rankings of any two-team-per-matchup system (chess, sports leagues, 'Go',
etc.). This implementation is capable of evaluating a variety of matchups,
Elo rating updates, and win probabilities, all based on the basic Elo
rating system. It also includes methods to benchmark performance,
including logistic regression and Markov chain models.

Ethan Heinzen

Ranking Teams by Elo Rating and Comparable Methods

elo.model.frame function

<dl><dt>formula</dt>
<dd>A formula. See the help page for formulas for details.</dd>
<dt>data</dt>
<dd>A <code>data.frame</code> in which to look for objects in <code>formula</code>.</dd>
<dt>na.action</dt>
<dd>A function which indicates what should happen when the data contain NAs.</dd>
<dt>subset</dt>
<dd>An optional vector specifying a subset of observations.</dd>
<dt>k</dt>
<dd>A constant k-value (or a vector, where appropriate).</dd>
<dt>...</dt>
<dd>Other arguments (not in use at this time).</dd>
<dt>required.vars</dt>
<dd>One or more of <code>c("wins", "elos", "k", "group", "regress")</code>,
denoting which variables are required to appear in the final model.frame.</dd>
<dt>warn.k</dt>
<dd>Should a warning be issued if <code>k</code> is specified as an argument and in <code>formula</code>?</dd>
<dt>ncol.k</dt>
<dd>How many columns (<code>NCOL</code>) should <code>k</code> have?</dd>
<dt>ncol.elos</dt>
<dd>How many Elo columns are expected?</dd></dl>

Arguments

Interpret formulas in elo functions — elo.model.frame

<dl>

<dt>formula</dt>
<dd>A formula. See the help page for formulas for details.</dd>


<dt>data</dt>
<dd>A <code>data.frame</code> in which to look for objects in <code>formula</code>.</dd>


<dt>na.action</dt>
<dd>A function which indicates what should happen when the data contain NAs.</dd>


<dt>subset</dt>
<dd>An optional vector specifying a subset of observations.</dd>


<dt>k</dt>
<dd>A constant k-value (or a vector, where appropriate).</dd>


<dt>...</dt>
<dd>Other arguments (not in use at this time).</dd>


<dt>required.vars</dt>
<dd>One or more of <code>c("wins", "elos", "k", "group", "regress")</code>,
denoting which variables are required to appear in the final model.frame.</dd>


<dt>warn.k</dt>
<dd>Should a warning be issued if <code>k</code> is specified as an argument and in <code>formula</code>?</dd>


<dt>ncol.k</dt>
<dd>How many columns (<code>NCOL</code>) should <code>k</code> have?</dd>


<dt>ncol.elos</dt>
<dd>How many Elo columns are expected?</dd>

</dl>

elo.model.frame: Interpret formulas in `elo` functions

Description

Usage

Arguments

See Also