Add Vertices to a Plot

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

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

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).

lwd

a vector of vertex border line widths.

...

Additional arguments to polygon

Value

None

Details

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

Note

network.vertex is a direct adaptation of gplot.vertex from the sna package.

References

Butts, C. T. (2008). “network: a Package for Managing Relational Data in R.” Journal of Statistical Software, 24(2). doi:10.18637/jss.v024.i02

See also

plot.network, polygon

Author

Carter T. Butts buttsc@uci.edu

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)
network.vertex(cos((1:10)/10*2*pi),sin((1:10)/10*2*pi),col=1:10,
    sides=3:12,radius=0.1)
#> Warning: 'x' is NULL so the result will be NULL