Masters

ELO Calculations

ELO calculations are located in the elo_ratings_masters.csv file

Masters Results Files

• masters_results_mastersdotcom.csv - Results copied from http://www.masters.com/en_US/tournament/past_winners.html. Includes all years (1934-2017), plus those who missed the cut. It does not include tournament earnings or FedExCup points.
• masters_results_pgatourdotcom.csv - Results copied from https://www.pgatour.com/tournaments/masters-tournament/past-results.html. Includes the years 1970-2017. Includes cut information, tournament earnings, and FedExCup points.
• masters_results_augustadotcom.csv - Results from http://www.augusta.com. Scraped using the file masters_results_augustadotcom.py. Includes all years (1934-2017) and tournament earnings. It does not include cut information or FedExCup points.

Scraping/Data Cleaning/Analysis Files

• masters_results_augustadotcom.py - Scrapes and cleans Masters results from http://www.augusta.com
• merge_leaderboards.py - Creates one leaderboard from the different Masters Results Files (work in progress)

Calculating ELO

• preparing_for_calculating_elo.R - R file to clean leaderboard_mastersdotcom.csv and prepare for ELO calculations
• analysis.R - R file with functions to calculate ELO

Functions in analysis.R to Calculate ELO

• first_year_elo() - Calculates the first year of ELO in 1934.
• get_elo_init() - Part of first_year_elo(). It grabs the first year (1934) and first round (r1) results from leaderboard_with_z_score_for_elo_calculating.csv and players in that round from player_list_initial_year.csv
• calculate_elo() - Calculates every year of ELO after 1934
• get_next_year_of_data() - Gets a player's most recent ELO rating. Part of calculate_elo().

Set up data frame

df <- data.frame(
  player = character(),
  year = integer(),
  round = character(),
  elo = numeric(),
  elo_new = numeric()
  )

Run first_year_elo

first_year_elo(1934, 'r1')

Run calculate_elo() for each individual year 1934-1942, 1946-2017

Each time calculate_elo() is run, it binds to df.

calculate_elo('1935')
calculate_elo('1936')
calculate_elo('1937')
...

Export df after you run calculate_elo() through 2017

write_csv(df, "elo_ratings_masters.csv")

Notes

• Cuts start at the Masters in 1957
• The Masters wasn't played from 1943-1945 because of World War II