sna (version 2.8)

gplot.vertex: Add Vertices to a Plot

Description

gplot.vertex adds one or more vertices (drawn using polygon) to a plot.

Usage

gplot.vertex(x, y, radius = 1, sides = 4, border = 1, col = 2, 
    lty = NULL, rot = 0, ...)

Value

None

Arguments

x

a vector of x coordinates.

y

a vector of y coordinates.

radius

a vector of vertex radii.

sides

a vector containing the number of sides to draw for each vertex.

border

a vector of vertex border colors.

col

a vector of vertex interior colors.

lty

a vector of vertex border line types.

rot

a vector of vertex rotation angles (in degrees).

...

Additional arguments to polygon

Author

Carter T. Butts

Details

gplot.vertex draws regular polygons of specified radius and number of sides, at the given coordinates. This is useful for routines such as gplot, which use such shapes to depict vertices.

See Also

gplot, polygon

Examples

#Open a plot window, and place some vertices
plot(0,0,type="n",xlim=c(-1.5,1.5),ylim=c(-1.5,1.5),asp=1)
gplot.vertex(cos((1:10)/10*2*pi),sin((1:10)/10*2*pi),col=1:10,
    sides=3:12,radius=0.1)