Arrow: Add arrow to plot.

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

Adds arrow to a plot, given base and point position along with half angle.

Usage

Arrow(pos, angle = 15, col = 2)

Arguments

pos	List with components lat, lon of length 2 or more (only first two used).
angle	Angle (< 90) determining arrow sharpness
col	Arrow color, defaults to color 2 of palette in effect.

Value

Mostly used for plotting, but the function returns the arrow polygon invisibly.

See Also

geopolygon, invProj

Examples

geoplot()
Arrow(list(lat=c(65,65.5),lon=c(-19, -18)),angle=60,col="brown")
Arrow(list(lat=c(65,65.5),lon=c(-19, -18)),angle=45,col="red")
Arrow(list(lat=c(65,65.5),lon=c(-19, -18)),angle=30,col="green")
Arrow(list(lat=c(65,65.5),lon=c(-19, -18)),angle=30,col="blue")

Example output

Loading required package: maps
Loading required package: mapdata

geo documentation built on May 29, 2017, 5:36 p.m.