colorblind: Colorblind Color Palette (Discrete) and Scales

Description Usage Arguments References See Also Examples

Description

An eight-color colorblind safe qualitative discrete palette.

Usage

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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.

breaks

One of:

  • NULL for no breaks

  • waiver() for the default breaks computed by the transformation object

  • A character vector of breaks

  • A function that takes the limits as input and returns breaks as output

limits

A character vector that defines possible values of the scale and their order.

drop

Should unused factor levels be omitted from the scale? The default, TRUE, uses the levels that appear in the data; FALSE uses all the levels in the factor.

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 value aesthetic value should missing be displayed as? Does not apply to position scales where NA is always placed at the far right.

scale_name

The name of the scale

name

The name of the scale. Used as the axis or legend title. If waiver(), the default, the name of the scale is taken from the first mapping used for that aesthetic. If NULL, the legend title will be omitted.

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)

  • A function that takes the breaks as input and returns labels as output

expand

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 expand_scale() 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 info.

position

The position of the axis. "left" or "right" for vertical scales, "top" or "bottom" for horizontal scales

super

The super class to use for the constructed scale

References

Chang, W. "Cookbook for R"

http://jfly.iam.u-tokyo.ac.jp/color

See Also

The dichromat package, dichromat_pal(), and scale_color_tableau() for other colorblind palettes.

Examples

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library("ggplot2")
library("scales")

show_col(colorblind_pal()(8))
p <- ggplot(mtcars) + geom_point(aes(x = wt, y = mpg,
     colour = factor(gear))) + facet_wrap(~am)
p + theme_igray() + scale_colour_colorblind()

Example output



ggthemes documentation built on Aug. 25, 2018, 1:03 a.m.