AddAlpha function

add alpha level to color that lacks one

AddAlpha(plotclr, alpha = 0.5, verbose = 0)

Arguments

• plotclr: color to be modified
• alpha: alpha level
• verbose: level of verbosity

Returns

modified color with alpha value

Author(s)

Markus Loecher

Examples

#example: 
#require(RColorBrewer)
if (requireNamespace("RColorBrewer", quietly = TRUE)) {
  plotclr <- RColorBrewer::brewer.pal(8,"YlOrRd")
  plotclr = AddAlpha(plotclr,0.5)
} else {
  print("package RColorBrewer must be installed for this example")
}