Section 16 Graphics parameter: linetype

The ggplot2 graphics parameter linetype is equivalent to the base graphics parameter lty.

16.1 Line Type (linetype)

• The ggplot2 line type (linetype) can be specified using:
  • text: blank, solid, dashed, dotted, dotdash, longdash, twodash
  • number: 0, 1, 2, 3, 4, 5, 6
• Hence, linetype = solid is identical to linetype = 1

16.2 linetype by Number & Text