testCol {PBSmodelling}

Display Colours Available Using a Set of Strings

Description

Display colours as round patches in a plot. Useful for programming purposes. Colours can be specified in any of 3 different ways:
(i) by colour name,
(ii) by hexadecimal colour code created by rgb(), or
(iii) by calling one of the colour palettes.

Usage

testCol(cnam=colors()[sample(length(colors()),15)])

Arguments

cnam

character – vector of colour names to display. Defaults to 15 random names from the color palette to use as patterns.

Author(s)

Rowan Haigh, Program Head – Offshore Rockfish
Pacific Biological Station (PBS), Fisheries & Oceans Canada (DFO), Nanaimo BC
locus opus: Offsite, Vancouver BC
Last modified Rd: 2023-10-18

See Also

In package PBSmodelling:
pickCol, testAlpha
In package PBStools:
testPch
In package grDevices:
palettes

Examples

local(envir=.PBSmodEnv,expr={
  # mix and match patterns
  testCol(c("sky","fire","sea","wood"))
})
local(envir=.PBSmodEnv,expr={
  # display transparencies of blue
  testCol(rgb(0,0,1,seq(0.05,1,0.05)))
})
local(envir=.PBSmodEnv,expr={
  # display colours of the rainbow
  testCol(rainbow(64,end=0.75))
})
local(envir=.PBSmodEnv,expr={
  # display basic palette colours
  testCol(1:length(palette()))
})
local(envir=.PBSmodEnv,expr={
  # mix colour types
  testCol(c("#9e7ad3", "purple", 6))
})