geolines.with.arrows: Add arrowhead to plot

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

Description

Adds arrowhead at the start or the end of a list of coordinates on a geoplot.

Usage

geolines.with.arrows(data, start = T, size = 0.2, ...)

Arguments

data	Dataframe with coordinates in columns lat, lon.
start	Start from beginning (i.e. arrow points at first coordinate), default TRUE.
size	Size of arrow
...	Additional arguments to Arrow

Value

Draws an Arrowhead at the start or the end of the coordinates given in data, returns invisibly the outline as four coordinate pairs in a dataframe.

Note

May need further elaboration and/or detail.

See Also

Called by geocurve, calls findline, invProj and Arrow.

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