Section 14 Graphics parameter: colour / color

• R Colour can be defined by:
  • by colour number: 1 to 7; colour 8 is light grey
  • by colour name: e.g. ‘red’ as an element of colours()
  • by a hexadecimal string of the form #RRGGBB
  • by an integer subscript i on the current palette()[i]
  • by package RColorBrewer
• To see all 657 colors defined by R, type colours()

14.1 Colour by Number

14.2 Colour by Name

Source: http://bxhorn.com/r-color-tables/

14.3 Colour by Hexadecimal String

Source: http://www.visibone.com

14.4 Colour by Palette

• Create a vector of n contiguous colors using the following functions:
  • rainbow(n)
  • heat.colors(n)
  • terrain.colors(n)
  • topo.colors(n)
  • cm.colors(n)

14.5 Package RColorBrewer

• The package RColorBrewer provides a combination of selected colours together into a set of palettes.