Answers.Body: <blockquote>
    <p>What I wanted to know was <strong>does it make a difference if you calculate
    the results one by one or as one batch?</strong></p>
  </blockquote>
  
  <p>According to <a href="http://glicko.net/glicko/glicko2.pdf" rel="nofollow noreferrer">Professor Mark E. Glickman</a> -</p>
  
  <blockquote>
    <p>The Glicko-2 system works best when the number of games in a rating
    period is moderate to large, say an average of at least 10-15 games
    per player in a rating period.</p>
  </blockquote>
  
  <p>Note the above link also gives Glickman's algorithms for Glicko 2</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-02-11T17:37:09.570Z
Answers.LastActivityDate: 2019-02-11T17:37:09.570Z
Answers.UserDisplayName: Brian Towers
Body: <p>I'm looking to implement a Glicko 2 library in my application. However the two libraries I'm considering are different. Firstly, they produce slightly different results for the same dataset (the default one given in the Glicko paper).</p>
  <p>Second, and what I'm interested in, is how they calculate the results. Library 1 calculates each match one-by-one. That is, n-function calls to <code>calculateMatch()</code>. Library 2 takes the entire set of data (all matches and players) and seemingly calculates it in one batch (although I'm not 100% on this).</p>
  <p>Does it make a difference if you calculate the results one by one or as one batch?</p>
  
Tags: <rating><glicko-2>
Title: Should I calculate the ratings match-by-match or batch of matches?
ThreadText: # Should I calculate the ratings match-by-match or batch of matches?
  
  (Asked by: username_0 on 2019-02-11)
  
  I'm looking to implement a Glicko 2 library in my application. However the two libraries I'm considering are different. Firstly, they produce slightly different results for the same dataset (the default one given in the Glicko paper).
  
  Second, and what I'm interested in, is how they calculate the results. Library 1 calculates each match one-by-one. That is, n-function calls to `calculateMatch()`. Library 2 takes the entire set of data (all matches and players) and seemingly calculates it in one batch (although I'm not 100% on this).
  
  Does it make a difference if you calculate the results one by one or as one batch?
  
  **Tags:** rating, glicko-2
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-02-11. Score: 1
  
  > What I wanted to know was **does it make a difference if you calculate
  > the results one by one or as one batch?**
  
  According to [Professor Mark E. Glickman](http://glicko.net/glicko/glicko2.pdf) -
  
  > The Glicko-2 system works best when the number of games in a rating
  > period is moderate to large, say an average of at least 10-15 games
  > per player in a rating period.
  
  Note the above link also gives Glickman's algorithms for Glicko 2
  
  
  ---
  
  