animateFX: Animate PITCHf/x

In pitchRx: Tools for Harnessing 'MLBAM' 'Gameday' Data and Visualizing 'pitchfx'

Description

Pitch trajectories animated on a two-dimensional plot.

Usage

animateFX(data, color = "pitch_types", avg.by, point.alpha = 1/3,
  limitz = c(-3.5, 3.5, 0, 7), flag = FALSE, interval = 0.01,
  layer = list(), parent = FALSE, ...)

Arguments

data	data frame with appropriately named PITCHf/x variables
color	variable used to control coloring scheme.
avg.by	variable used as an index for averaging over PITCHf/x parameters
point.alpha	ggplot2 alpha parameter
limitz	limits for horizontal and vertical axes.
flag	indicate whether or not batter has decided to swing.
interval	time (in seconds) between plotting the pitch locations.
layer	list of ggplot2 layer modifications.
parent	is the function being called from a higher-level function? (experimental)
...	extra options passed onto geom commands

Details

animateFX plots a series of "snapshots" that represent pitch trajectories from the point of release until all of them reach home plate. The graphic takes on the viewpoint of the umpire; that is, the pitches are getting closer to the viewer with time. This is relected with the increase in size of the "balls" as the animation progresses.

Value

Returns a series of objects of the class used by package ggplot2 to represent plots.

Examples

data(pitches)
#generate animation and prompt default web browser to view the sequence of plots
## Not run: 
animation::saveHTML({ animateFX(pitches, layer = facet_grid(pitcher_name~stand)) })
animation::saveHTML({ animateFX(pitches, avg.by="pitch_types",
                         layer = facet_grid(pitcher_name~stand))
                   })

## End(Not run)

pitchRx documentation built on May 2, 2019, 5:56 a.m.