lucent function

Convert Solid Colours to Translucence

Convert a vector of solid colours to a vector of translucent ones (or vice versa)

lucent(col.pal=1, a=1)

Arguments

• col.pal: vector of colours
• a: alpha transparency value (0 = fully transparent, 1 = opaque)

Details

The function acts as a small wrapper to the rgb function.

Returns

Vector of transformed colours depending on the alpha transparancy value a.

Author(s)

Steve Martell, International Pacific Halibut Commission, Seattle WA

See Also

pickCol, testCol, col2rgb, rgb

Examples

local(envir=.PBSmodEnv,expr={
  oldpar = par(no.readonly=TRUE)
  pbsfun = function(clrs=c("moccasin",rainbow(3))){
    clrs = c(clrs,lucent(clrs,a=0.25))
    testCol(clrs); invisible() }
  pbsfun()
  par(oldpar)
})