add_xyac: Add expected yards after completion (xyac) variables

In nflfastR: Functions to Efficiently Access NFL Play by Play Data

Add expected yards after completion (xyac) variables

Description

Add expected yards after completion (xyac) variables

Usage

add_xyac(pbp, ...)

Arguments

pbp	is a Data frame of play-by-play data scraped using fast_scraper().
...	Additional arguments passed to a message function (for internal use).

Details

Build columns that capture what we should expect after the catch.

Value

The input Data Frame of the parameter 'pbp' with the following columns added:

xyac_epa

Expected value of EPA gained after the catch, starting from where the catch was made. Zero yards after the catch would be listed as zero EPA.

xyac_success

Probability play earns positive EPA (relative to where play started) based on where ball was caught.

xyac_fd

Probability play earns a first down based on where the ball was caught.

xyac_mean_yardage

Average expected yards after the catch based on where the ball was caught.

xyac_median_yardage

Median expected yards after the catch based on where the ball was caught.

nflfastR documentation built on May 29, 2024, 6:55 a.m.