Auxiliary methods for geoGraph

These methods are low-level functions called by other procedures of geoGraph. Some can, however, be useful in themselves. Note that unlike other functions in geoGraph, these functions do not generally test for the validity of the provided arguments (for speed purposes).

Usage

hasCosts(x)

geo.segments(
  x0,
  y0,
  x1,
  y1,
  col = graphics::par("fg"),
  lty = graphics::par("lty"),
  lwd = graphics::par("lwd"),
  ...
)

Arguments

x

a valid gGraph.

x0, y0

coordinates of points from which to draw.

x1, y1

coordinates of points to which to draw.

col

a character string or an integer indicating the color of the segments.

lty

a character string or an integer indicating the type of line.

lwd

an integer indicating the line width.

...

further graphical parameters (from 'par') passed to the segments function.

Value

For hasCost, a logical value is returned. geo.segments

returns NULL.

Details

• hasCosts: tests whether a gGraph has costs associated to its edges.
  

• geo.segments: a substitute to segments which correctly draws segments between locations distant by more than 90 degrees of longitude.
  

• rebuild: in development.

Examples

hasCosts(worldgraph.10k)
#> [1] FALSE