Stamp an arrow/arrows
stamp_arrow.RdThis function adds an arrow annotation layer Contribute or help document https://github.com/EvaMaeRey/ggstamp/blob/master/R/stamp_arrow.R
stamp_arrow( x = 0, y = 0, xend = 1, yend = 1, alpha = 1, color = "black", linetype = "solid", size = 1.5, ends = "last", units = "npc", headlength = 0.03, headangle = 30, headtype = "open", lineend = "butt", linejoin = "round", arrow.fill = T )
Arguments
| x | numeric x position, defaults to 0 |
|---|---|
| y | numeric y position, defaults to 0 |
| xend | numeric x end position, defaults to 1 |
| yend | numeric y end position, defaults to 1 |
| alpha | numeric between 0 and 1 indicating transparency, defaults to 1 fully opaque, zero is fully transparent |
| color | a character string indicating color, defaults to "black", for other named colors check out https://evamaerey.github.io/ggplot2_grammar_guide/named_colors |
| linetype | a string indicating linetype, "solid", "dashed", "dotted", defaults to "solid" |
| size | numeric value indicating line width, defaults to 1.5 |
| ends | a character string, one of "last", "first", or "both", indicating which ends of the line to draw arrow heads, defaults to last |
| units | A character vector specifying the units for head length, default is "npc" for native plot coordinates |
| headlength | A numeric value specifying the length of the arrow head (from tip to base), defaults to .03 |
| headangle | A numeric value, the angle of the arrowhead in degrees (smaller numbers produce narrower, pointier arrows). Essentially describes the width of the arrow head. |
| headtype | One of "open" or "closed" indicating whether the arrow head should be a closed triangle. |
| lineend | Line end style (round, butt, square) |
| linejoin | Line join style (round, mitre, bevel) |
| arrow.fill | fill colour to use for the arrow head (if closed). NULL means use colour aesthetic. |
Value
Examples
# stamp arrow on plot library(ggplot2) ggplot(cars) + aes(speed, dist) + geom_point() + stamp_arrow() + stamp_arrow(color = "darkred", xend = 15, yend = 75)# several arrows ggcanvas() + stamp_arrow(color = "steelblue") + stamp_arrow(x = 1:5, y = 2, xend = 2:6, headlength = .04, headtype = "closed", color = "darkred") + stamp_arrow(x = .5, xend = 1.5, ends = "both", headangle = 60)
