string.to.colors: Convert between strings to colors

In dustinfife/fifer: A Biostatisticians Toolbox for Various Activities, Including Plotting, Data Cleanup, and Data Analysis

Description

Automatically convert a vector of strings into a color for easy plotting

Usage

string.to.colors(string, colors = NULL, alpha = 1)

Arguments

string	a vector of strings representing groups.
colors	a vector of colors, one for each unique element in string.
alpha	a transparency value to apply to all colors (or a vector of transparency values)

Value

a vector of colors, one for each element in string

Note

This function can also be used to specify pch values, cex values, or any other plotting values the user may wish to differ across groups. See examples.

Author(s)

Dustin Fife

See Also

number.to.colorsalpha

Examples

groups = sample(LETTERS[1:5], size=100, replace=TRUE)
plot(rnorm(100), rnorm(100), col=string.to.colors(groups))
plot(rnorm(100), rnorm(100), col=string.to.colors(groups), 
   pch=as.numeric(string.to.colors(groups, colors=c(16:20))))

dustinfife/fifer documentation built on Oct. 31, 2020, 3:36 p.m.