geom_glowpath           Connect Observations
geom_glowpoint          Points
geom_shadowpath         Connect Observations
geom_shadowpoint        Points
scale_brewer            Sequential, diverging and qualitative colour
                        scales from colorbrewer.org
scale_colour_hue        Evenly spaced colours for discrete data
scale_colour_steps      Binned gradient colour scales
scale_continuous        Continuous and binned colour scales
scale_gradient          Gradient colour scales
scale_grey              Sequential grey colour scales
scale_shadowcolour_identity
                        Use values without scaling
scale_shadowcolour_manual
                        Create your own discrete scale
scale_viridis           Viridis colour scales from viridisLite
