scale_axes_mlb: Axis Scales for MLB Team Logos

In camdenk/mlbplotR: Create 'ggplot2' and 'gt' Visuals with Major League Baseball Logos

Axis Scales for MLB Team Logos

Description

scale_x_mlb() and scale_y_mlb() have been superceded in favor of ⁠element_*_logo()⁠ functions These functions map MLB team names to their team logos and make them available as axis labels

Usage

scale_x_mlb(
  ...,
  expand = ggplot2::waiver(),
  guide = ggplot2::waiver(),
  position = "bottom",
  size = 12
)

scale_y_mlb(
  ...,
  expand = ggplot2::waiver(),
  guide = ggplot2::waiver(),
  position = "left",
  size = 12
)

Arguments

...	Arguments passed on to discrete_scale palette A palette function that when called with a single integer argument (the number of levels in the scale) returns the values that they should take (e.g., scales::pal_hue()). breaks One of: NULL for no breaks waiver() for the default breaks (the scale limits) A character vector of breaks A function that takes the limits as input and returns breaks as output. Also accepts rlang lambda function notation. limits One of: NULL to use the default scale values A character vector that defines possible values of the scale and their order A function that accepts the existing (automatic) values and returns new ones. Also accepts rlang lambda function notation. drop Should unused factor levels be omitted from the scale? The default, TRUE, uses the levels that appear in the data; FALSE includes the levels in the factor. Please note that to display every level in a legend, the layer should use show.legend = TRUE. na.translate Unlike continuous scales, discrete scales can easily show missing values, and do so by default. If you want to remove missing values from a discrete scale, specify na.translate = FALSE. na.value If na.translate = TRUE, what aesthetic value should the missing values be displayed as? Does not apply to position scales where NA is always placed at the far right. aesthetics The names of the aesthetics that this scale works with. labels One of: NULL for no labels waiver() for the default labels computed by the transformation object A character vector giving labels (must be same length as breaks) An expression vector (must be the same length as breaks). See ?plotmath for details. A function that takes the breaks as input and returns labels as output. Also accepts rlang lambda function notation. call The call used to construct the scale for reporting messages. super The super class to use for the constructed scale
expand	For position scales, a vector of range expansion constants used to add some padding around the data to ensure that they are placed some distance away from the axes. Use the convenience function expansion() to generate the values for the expand argument. The defaults are to expand the scale by 5% on each side for continuous variables, and by 0.6 units on each side for discrete variables.
guide	A function used to create a guide or its name. See guides() for more information.
position	For position scales, The position of the axis. left or right for y axes, top or bottom for x axes.
size	The logo size in pixels. It is applied as height for an x-scale and as width for an y-scale.

Details

The scale translates MLB team abbreviations into raw image html and places the html as axis labels. Because of the way ggplots are constructed, it is necessary to adjust the theme() after calling this scale. This can be done by calling theme_x_mlb() or theme_y_mlb() or alternatively by manually changing the relevant axis.text to ggtext::element_markdown(). However, this will only work if an underlying dependency, "gridtext", is installed with a newer version than 0.1.4

Value

A discrete ggplot2 scale created with ggplot2::scale_x_discrete() or ggplot2::scale_y_discrete().

Examples

library(mlbplotR)
library(ggplot2)

team_abbr <- valid_team_names()
# remove league logos from this example
team_abbr <- team_abbr[!team_abbr %in% c("AL", "NL", "MLB")]

df <- data.frame(
  random_value = runif(length(team_abbr), 0, 1),
  teams = team_abbr
)

if (utils::packageVersion("gridtext") > "0.1.4"){
  # use logos for x-axis
  ggplot(df, aes(x = teams, y = random_value)) +
    geom_col(aes(color = teams, fill = teams), width = 0.5) +
    scale_color_mlb(type = "secondary") +
    scale_fill_mlb(alpha = 0.4) +
    scale_x_mlb() +
    theme_minimal() +
    # theme_*_mlb requires gridtext version > 0.1.4
    theme_x_mlb()

  # use logos for y-axis
  ggplot(df, aes(y = teams, x = random_value)) +
    geom_col(aes(color = teams, fill = teams), width = 0.5) +
    scale_color_mlb(type = "secondary") +
    scale_fill_mlb(alpha = 0.4) +
    scale_y_mlb() +
    theme_minimal() +
    # theme_*_mlb requires gridtext version > 0.1.4
    theme_y_mlb()
}

camdenk/mlbplotR documentation built on June 15, 2024, 6:27 a.m.