def get_pa_count_pfx(df):
# PA = AB + BB + HBP + SH + SF + Times Reached on Defensive Interference
pa_extras = ['Walk', 'Sac Fly', 'Hit By Pitch', 'Intent Walk', 'Sac Bunt',
'Sac Fly', 'Catcher Interference', 'Fan interference',
'Batter Interference', 'Sac Fly DP', 'Sacrifice Bunt DP']
pa = (Baseball.get_atbats_count_pfx(df) +
len(df[df['event'].isin(pa_extras)].groupby(['gameday_link','num']).first()))
return pa
def get_pa_count_pfx(df):
"""
Given a pitchab dataframe return the number of official plate appearances
PA = AB + BB + HBP + SH + SF + Times Reached on Defensive Interference
-> Calculate by first counting at-bats and then counting additional events
that count toward a plate appearance
"""
pa_extras = ['Walk', 'Sac Fly', 'Hit By Pitch', 'Intent Walk', 'Sac Bunt',
'Sac Fly', 'Catcher Interference', 'Fan interference',
'Batter Interference', 'Sac Fly DP', 'Sacrifice Bunt DP']
pa = (Baseball.get_atbats_count_pfx(df) +
len(df[df['event'].isin(pa_extras)].groupby(['gameday_link','num']).first()))
return pa
def get_pa_for_obp(df):
# At Bats + Walks + Hit by Pitch + Sacrifice Flies
obp_pa_extras = ['Walk', 'Sac Fly', 'Hit By Pitch', 'Intent Walk',
'Sac Fly', 'Catcher Interference', 'Fan interference',
'Batter Interference', 'Sac Fly DP', 'Sacrifice Bunt DP']
obp_pa = (Baseball.get_atbats_count_pfx(df) +
len(df[df['event'].isin(obp_pa_extras)].groupby(['gameday_link','num']).first()))
return obp_pa
def get_slg_pfx(df):
"""
Calculate slugging from a pitchab dataframe
SLG = (Total bases) / (At Bats)
"""
tb = Baseball.get_tb(df)
ab = Baseball.get_atbats_count_pfx(df)
return(tb/ab)