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

alpha {scales}

R Documentation

Modify colour transparency. Vectorised in both colour and alpha.

Modify colour transparency. Vectorised in both colour and alpha.

alpha(colour, alpha = NA)

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

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

[Package scales version 1.0.0 Index]