baseballr (version 1.5.0)

label_statcast_imputed_data: Label Statcast data as imputed

Description

Based on a series of heuristics, this function attempts to label Statcast data for which the launch angle and speed have been imputed.

Usage

label_statcast_imputed_data(
  statcast_df,
  impute_file = NULL,
  inverse_precision = 10000
)

Value

A copy of the input dataframe with a new column imputed appended. imputed is 1 if launch angle and launch speed are likely imputed, 0 otherwise. Returns a tibble with the following columns:

col_name	types
pitch_type	character
game_date	Date
release_speed	numeric
release_pos_x	numeric
release_pos_z	numeric
player_name	character
batter	numeric
pitcher	numeric
events	character
description	character
spin_dir	logical
spin_rate_deprecated	logical
break_angle_deprecated	logical
break_length_deprecated	logical
zone	numeric
des	character
game_type	character
stand	character
p_throws	character
home_team	character
away_team	character
type	character
hit_location	integer
bb_type	character
balls	integer
strikes	integer
game_year	integer
pfx_x	numeric
pfx_z	numeric
plate_x	numeric
plate_z	numeric
on_3b	numeric
on_2b	numeric
on_1b	numeric
outs_when_up	integer
inning	numeric
inning_topbot	character
hc_x	numeric
hc_y	numeric
tfs_deprecated	logical
tfs_zulu_deprecated	logical
fielder_2	numeric
umpire	logical
sv_id	logical
vx0	numeric
vy0	numeric
vz0	numeric
ax	numeric
ay	numeric
az	numeric
sz_top	numeric
sz_bot	numeric
hit_distance_sc	numeric
launch_speed	numeric
launch_angle	numeric
effective_speed	numeric
release_spin_rate	numeric
release_extension	numeric
game_pk	numeric
pitcher_1	numeric
fielder_2_1	numeric
fielder_3	numeric
fielder_4	numeric
fielder_5	numeric
fielder_6	numeric
fielder_7	numeric
fielder_8	numeric
fielder_9	numeric
release_pos_y	numeric
estimated_ba_using_speedangle	numeric
estimated_woba_using_speedangle	numeric
woba_value	numeric
woba_denom	integer
babip_value	integer
iso_value	integer
launch_speed_angle	integer
at_bat_number	numeric
pitch_number	numeric
pitch_name	character
home_score	numeric
away_score	numeric
bat_score	numeric
fld_score	numeric
post_away_score	numeric
post_home_score	numeric
post_bat_score	numeric
post_fld_score	numeric
if_fielding_alignment	character
of_fielding_alignment	character
spin_axis	numeric
delta_home_win_exp	numeric
delta_run_exp	numeric
ila	integer
ils	integer
imputed	numeric

Arguments

statcast_df

A dataframe containing Statcast batted ball data

impute_file

A CSV file giving the launch angle, launch speed, bb_type, events fields to label as imputed. if NULL then it's read from the extdata folder of the package.

inverse_precision

inverse of how many digits to truncate the launch angle and speed to for comparison. Default is 10000, i.e. keep 4 digits of precision.

Examples

# \donttest{
  statcast_df <- statcast_search("2017-05-01", "2017-05-02")
  sc_df <- label_statcast_imputed_data(statcast_df)
  mean(sc_df$imputed)
# }