About

line geom

Articles Related

Rules

Reference lines (sometimes called rules) are useful for annotating plots.

• geom_abline: diagonal - (specified by slope a and intercept b )
• geom_hline : horizontal
• geom_vline: vertical

Line Configuration

• current/geom_segment.html: straight line
• current/geom_curve.html: curved line

• Scale: current/scale_linetype.html : Aesthetic specifications - Line Type

lty <- c("blank", "solid", "dashed", "dotted", "dotdash", 
     "longdash","twodash")
linetypes <- data.frame(
  y = seq_along(lty),
  lty = lty
) 
ggplot(linetypes, aes(0, y)) + 
  geom_segment(aes(xend = 5, yend = y, linetype = lty)) + 
  scale_linetype_identity() + 
  geom_text(aes(label = lty), hjust = 0, nudge_y = 0.2) +
  scale_x_continuous(NULL, breaks = NULL) + 
  scale_y_continuous(NULL, breaks = NULL)