Given a `nflscrapR` play-by-play data frame, calculate the air and yac WPA for passing playse using the `nflscrapR` win probability model and include append the column to the input data frame. See here for an explanation of the model methodology: https://arxiv.org/abs/1802.00998. Source code for fitting the model is located here https://github.com/ryurko/nflscrapR-models/blob/master/R/init_models/init_ep_fg_models.R.
add_air_yac_wp_variables(pbp_data)
Data frame with all of the necessary columns used to estimate and include the air and yac wpa
The input data frame with additional columns included for the air WPA (air_wpa), yac WPA (yac_wpa), and cumulative totals for home and away teams (total_home_air_wpa, total_home_yac_wpa, etc.).