col_transp {Momocs}

Transparency helpers and palettes

Description

To ease transparency handling.

Usage

col_transp(n, col = "#000000", ceiling = 1)

col_alpha(cols, transp = 0)

Arguments

n

the number of colors to generate

col

a color in hexadecimal format on which to generate levels of transparency

ceiling

the maximal opacity (from 0 to 1)

cols

on or more colors, provided as hexadecimal values

transp

numeric between 0 and 1, the value of the transparency to obtain

Value

colors

Examples

x <- col_transp(10, col='#000000')
x
barplot(1:10, col=x, main='a transparent black is grey')

summer10 <- col_summer(10)
summer10
summer10.transp8 <- col_alpha(summer10, 0.8)
summer10.transp8
summer10.transp2 <- col_alpha(summer10, 0.8)
summer10.transp2
x <- 1:10
barplot(x, col=summer10.transp8)
barplot(x/2, col=summer10.transp2, add=TRUE)