Add Arrows to a Stereoplot

A quiver plot displays displacement vectors into pointing into the direction of movement.

Usage

stereo_arrows(
  x,
  sense,
  scale = 0.1,
  angle = 10,
  length = 0.1,
  upper.hem = FALSE,
  earea = TRUE,
  ...
)

x: object of class "Vec3", "Line", "Ray", or "Plane", where the rows are the observations and the columns are the coordinates.
sense: numeric. Sense of the line on a fault plane. Either 1or -1 for normal or thrust offset, respectively. The "sense" is the sign of the fault's rake (see Fault_from_rake() for details).
scale: numeric. Scales the length of the vector. 0.1 by default
angle: numeric. Angle from the shaft of the arrow to the edge of the arrow head.
length: numeric. Length of the edges of the arrow head (in inches).
upper.hem: logical. Whether the projection is shown for upper hemisphere (TRUE) or lower hemisphere (FALSE, the default).
earea: logical TRUE for Lambert equal-area projection (also "Schmidt net"; the default), or FALSE for meridional stereographic projection (also "Wulff net" or "Stereonet").
...: arguments passed to graphics::arrows()

set.seed(20250411)
stereoplot()
p <- rvmf(n = 100)
points(p, pch = 16, cex = .5)
stereo_arrows(p, sense = 1, col = "red")