alpha: Modify colour transparency. Vectorised in both colour and...

Description Usage Arguments Examples

View source: R/colour-manip.r

Description

Modify colour transparency. Vectorised in both colour and alpha.

Usage

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alpha(colour, alpha = NA)

Arguments

colour

colour

alpha

new alpha level in [0,1]. If alpha is NA, existing alpha values are preserved.

Examples

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alpha("red", 0.1)
alpha(colours(), 0.5)
alpha("red", seq(0, 1, length.out = 10))

scales documentation built on Aug. 10, 2018, 1:17 a.m.