wrMisc (version 1.15.3.1)

transpGraySca: Make single vector gray-gradient

Description

This function helps making gray-gradients. Note : The resulting color gradient does not seem linear to the human eye, you may try gray.colors instead

Usage

transpGraySca(startGray = 0.2, endGrey = 0.8, nSteps = 5, transp = 0.3)

Value

character vector (of same length as x) with color encoding

Arguments

startGray

(numeric) gray shade at start

endGrey

(numeric) gray shade at end

nSteps

(integer) number of levels

transp

(numeric) transparency alpha

See Also

gray.colors

Examples

layout(1:2)
col1 <- transpGraySca(0.8,0.3,7,0.9) 
pie(rep(1,length(col1)), col=col1, main="from transpGraySca")
col2 <- gray.colors(7,0.9,0.3,alph=0.9)
pie(rep(1,length(col2)), col=col2, main="from gray.colors")