calculate_player_stats: Get Official Game Stats
In nflfastR: Functions to Efficiently Access NFL Play by Play Data

calculate_player_stats

R Documentation

Get Official Game Stats

Description

Build columns that aggregate official passing, rushing, and receiving stats either at the game level or at the level of the entire data frame passed.

Usage

calculate_player_stats(pbp, weekly = FALSE)

Arguments

`pbp`	A Data frame of NFL play-by-play data typically loaded with `load_pbp()` or `build_nflfastR_pbp()`. If the data doesn't include the variable `qb_epa`, the function `add_qb_epa()` will be called to add it.
`weekly`	If `TRUE`, returns week-by-week stats, otherwise, stats for the entire Data frame.

Value

A data frame including the following columns (all ID columns are decoded to the gsis ID format):

player_id: ID of the player. Use this to join to other sources.
player_name: Name of the player
player_display_name: Full name of the player
position: Position of the player
position_group: Position group of the player
headshot_url: URL to a player headshot image
games: The number of games where the player recorded passing, rushing or receiving stats.
recent_team: Most recent team player appears in pbp with.
season: Season if weekly is TRUE
week: Week if weekly is TRUE
season_type: REG or POST if weekly is TRUE
opponent_team: The player's opponent team if weekly is TRUE
completions: The number of completed passes.
attempts: The number of pass attempts as defined by the NFL.
passing_yards: Yards gained on pass plays.
passing_tds: The number of passing touchdowns.
interceptions: The number of interceptions thrown.
sacks: The Number of times sacked.
sack_yards: Yards lost on sack plays.
sack_fumbles: The number of sacks with a fumble.
sack_fumbles_lost: The number of sacks with a lost fumble.
passing_air_yards: Passing air yards (includes incomplete passes).
passing_yards_after_catch: Yards after the catch gained on plays in which player was the passer (this is an unofficial stat and may differ slightly between different sources).
passing_first_downs: First downs on pass attempts.
passing_epa: Total expected points added on pass attempts and sacks. NOTE: this uses the variable qb_epa, which gives QB credit for EPA for up to the point where a receiver lost a fumble after a completed catch and makes EPA work more like passing yards on plays with fumbles.
passing_2pt_conversions: Two-point conversion passes.
pacr: Passing Air Conversion Ratio. PACR = passing_yards / passing_air_yards
dakota: Adjusted EPA + CPOE composite based on coefficients which best predict adjusted EPA/play in the following year.
carries: The number of official rush attempts (incl. scrambles and kneel downs). Rushes after a lateral reception don't count as carry.
rushing_yards: Yards gained when rushing with the ball (incl. scrambles and kneel downs). Also includes yards gained after obtaining a lateral on a play that started with a rushing attempt.
rushing_tds: The number of rushing touchdowns (incl. scrambles). Also includes touchdowns after obtaining a lateral on a play that started with a rushing attempt.
rushing_fumbles: The number of rushes with a fumble.
rushing_fumbles_lost: The number of rushes with a lost fumble.
rushing_first_downs: First downs on rush attempts (incl. scrambles).
rushing_epa: Expected points added on rush attempts (incl. scrambles and kneel downs).
rushing_2pt_conversions: Two-point conversion rushes
receptions: The number of pass receptions. Lateral receptions officially don't count as reception.
targets: The number of pass plays where the player was the targeted receiver.
receiving_yards: Yards gained after a pass reception. Includes yards gained after receiving a lateral on a play that started as a pass play.
receiving_tds: The number of touchdowns following a pass reception. Also includes touchdowns after receiving a lateral on a play that started as a pass play.
receiving_air_yards: Receiving air yards (incl. incomplete passes).
receiving_yards_after_catch: Yards after the catch gained on plays in which player was receiver (this is an unofficial stat and may differ slightly between different sources).
receiving_fumbles: The number of fumbles after a pass reception.
receiving_fumbles_lost: The number of fumbles lost after a pass reception.
receiving_2pt_conversions: Two-point conversion receptions
racr: Receiver Air Conversion Ratio. RACR = receiving_yards / receiving_air_yards
target_share: The share of targets of the player in all targets of his team
air_yards_share: The share of receiving_air_yards of the player in all air_yards of his team
wopr: Weighted Opportunity Rating. WOPR = 1.5 × target_share + 0.7 × air_yards_share
fantasy_points: Standard fantasy points.
fantasy_points_ppr: PPR fantasy points.

Examples


try({# to avoid CRAN test problems
pbp <- nflfastR::load_pbp(2020)

weekly <- calculate_player_stats(pbp, weekly = TRUE)
dplyr::glimpse(weekly)

overall <- calculate_player_stats(pbp, weekly = FALSE)
dplyr::glimpse(overall)
})

nflfastR documentation built on Oct. 20, 2023, 5:14 p.m.