translude: Using transparence to modify colors
In IRSN/RobustInv: "Robust inversion of expensive black-box functions"

Description Usage Arguments Value Author(s) Examples

Modifies a color by playing on its transparence. Low alpha make the color more transparent while larger alpha make it opaque.

1	translude(colors, alpha = 0.6)

`colors`	A color or an array where each element is a color.
`alpha`	Scalar taking values between 0 (fully transparent) and 1 (opaque).

An array with the colors transluded with opacity alpha

Yann Richet yann.richet@irsn.fr

library("grid")
onecolor <- "blue"

shades.count <- 10

alpha_tab <- seq(from = 0, to = 1, length=shades.count)
result <- rep("",times = shades.count)

for(i in 1:shades.count) result[i] <- translude(colors=onecolor,alpha_tab[i])
plotCol(result,txt.col=result)