vec2col: Generate colors from a vector

In yihui/MSG: Data and Functions for the Book Modern Statistical Graphics

Description

This functions generates a color vector from an input vector, which can be of the class numeric or factor.

Usage

vec2col(vec, n, name)

## Default S3 method:
vec2col(vec, n, name)

## S3 method for class 'factor'
vec2col(vec, n, name)

Arguments

vec	the numeric or factor vector
n	the number of colors to be generated from the palette
name	the name of the palette

Value

a vector of colors corresponding to the input vector

Author(s)

Yihui Xie <https://yihui.org>

Examples

## convert factor to colors
with(iris, plot(Petal.Length, Petal.Width, col = vec2col(Species), pch = 19))

# another palette
with(iris, plot(Petal.Length, Petal.Width, col = vec2col(Species, name = "Dark2"),
    pch = 19))

## turn numeric values to colors
with(iris, plot(Petal.Length, Petal.Width, col = vec2col(Petal.Width), pch = 19))

yihui/MSG documentation built on Aug. 16, 2021, 12:13 p.m.