Scale for line patterns

Default line types based on a set supplied by Richard Pearson, University of Manchester. Continuous values can not be mapped to line types.

scale_linetype(..., na.value = "blank")

scale_linetype_continuous(...)

scale_linetype_discrete(..., na.value = "blank")

Arguments

...	common discrete scale parameters: name, breaks, labels, na.value, limits and guide. See discrete_scale for more details
na.value	The linetype to use for NA values.

Examples

base <- ggplot(economics_long, aes(date, value01))
base + geom_line(aes(group = variable))
base + geom_line(aes(linetype = variable))

# See scale_manual for more flexibility

# Common line types ----------------------------
df_lines <- data.frame(
  linetype = factor(
    1:4,
    labels = c("solid", "longdash", "dashed", "dotted")
  )
)
ggplot(df_lines) +
  geom_hline(aes(linetype = linetype, yintercept = 0), size = 2) +
  scale_linetype_identity() +
  facet_grid(linetype ~ .) +
  theme_void(20)
#> Warning: partial match of 'y' to 'yintercept'