Compass Rose — compassRose • graphicsutils

This function draws a fully personnalisable compass rose.

compassRose(
  x = 0,
  y = 0,
  labels = c("S", "W", "N", "E"),
  rot = 0,
  cex.cr = 1,
  cex.let = cex.cr,
  col.cr = c(1, 8),
  col.let = 1,
  border = c(1, 8),
  offset = 1.2,
  add = TRUE,
  ...
)

compassRoseCardinal(
  x,
  y = x,
  rot = 0,
  cex.cr = 1,
  cex.let = 1,
  labels = c("S", "W", "N", "E"),
  offset = 1.2,
  col.cr = c(1, 8),
  col.let = 1,
  border = c(1, 8),
  ...
)

Arguments

x	the x coordinates of the center of the compass rose.
y	the y coordinates of the center of the compass rose.
labels	a vector of four character strings used as labels for the cardinal directions.
rot	rotation for the compass rose in degrees (clockwise).
cex.cr	the magnification to be used for the whole compass rose.
cex.let	the magnification to be used for labels.
col.cr	a vector of colors used to draw compass rose (see details).
col.let	a character string specifying the labels' color.
border	a vector of colors of the borders of the compass rose.
offset	label offset of the cardinal points.
add	a logical. Should the compass rose be added on the current graph?
...	additional arguments to be passed to `graphics::polygon()`.

Details

Both col.cr and border are repeated over (base::rep() is called) so it has a 8 elements, meaning all triangles the compass rose is made of could have their own color.

Note that there already exists a similar function by Jim Lemon in sp package.

Functions

compassRose: A compass rose with the four cardinal directions and additional directions.
compassRoseCardinal: A compass with the four cardinal directions only.

Examples

compassRose(0, rot=25, cex.cr = 2, col.let =2, add = FALSE)