scale_colour_manual(..., values)scale_fill_manual(..., values)scale_size_manual(..., values)scale_shape_manual(..., values)scale_linetype_manual(..., values)scale_alpha_manual(..., values)
name
, breaks
,
labels
, na.value
, limits
and guide
. See
discrete_scale
for more detailsna.value
.Create your own discrete scale.
p <- ggplot(mtcars, aes(mpg, wt)) + geom_point(aes(colour = factor(cyl))) p + scale_colour_manual(values = c("red","blue", "green"))
p + scale_colour_manual( values = c("8" = "red","4" = "blue","6" = "green"))
# With rgb hex values p + scale_colour_manual(values = c("#FF0000", "#0000FF", "#00FF00"))
# As with other scales you can use breaks to control the appearance # of the legend cols <- c("8" = "red","4" = "blue","6" = "darkgreen", "10" = "orange") p + scale_colour_manual(values = cols)
p + scale_colour_manual(values = cols, breaks = c("4", "6", "8"))
p + scale_colour_manual(values = cols, breaks = c("8", "6", "4"))
p + scale_colour_manual(values = cols, breaks = c("4", "6", "8"), labels = c("four", "six", "eight"))
# And limits to control the possible values of the scale p + scale_colour_manual(values = cols, limits = c("4", "8"))
p + scale_colour_manual(values = cols, limits = c("4", "6", "8", "10"))
# Notice that the values are matched with limits, and not breaks p + scale_colour_manual(limits = c(6, 8, 4), breaks = c(8, 4, 6), values = c("grey50", "grey80", "black"))