Reference

All functions
down_distance_updater()	Update the down and distance of a drive
expected_pts_fourth()	Decision for 4th downs based on expected points
prep_pbp_data()	Add necessary columns to nflscrapR data
sample_drives()	Sample a Series of Drives, a strategy to test verses the normal strategy
sample_fourth_down_strategy()	Sample NFL play-by-play data with a specified 4th down strategy
sample_passes_rushes_strategy()	Sample NFL play-by-play data with a specified blend of rushing and passing
sample_play()	Sample one NFL play according to some strategy