Sample points for triangulated networks — tnss

uses various sampling strategies to create dummy nodes for the tnss_tree

tnss_dummies(
  xy,
  root,
  circ = TRUE,
  line = TRUE,
  diag = TRUE,
  grid = FALSE,
  rand = FALSE,
  ncirc = 9,
  rcirc = 2,
  nline = 10,
  ndiag = 50,
  ngrid = 50,
  nrand = 50
)

Arguments

xy: coordinates of "real" nodes
root: root node id
circ: logical. create circular dummy nodes around leafs.
line: logical. create dummy nodes on a straight line between root and leafs.
diag: logical. create dummy nodes diagonally through space.
grid: logical. create dummy nodes on a grid.
rand: logical. create random dummy nodes.
ncirc: numeric. number of circular dummy nodes per leaf.
rcirc: numeric. radius of circles around leaf nodes.
nline: numeric. number of straight line nodes per leaf.
ndiag: numeric. number of dummy nodes on diagonals.
ngrid: numeric. number of dummy nodes per dim on grid.
nrand: numeric. number of random nodes to create.

Value

coordinates of dummy nodes

Author

David Schoch

Examples

# dummy nodes for tree rooted in California
xy <- cbind(state.center$x,state.center$y)
xy_dummy <- tnss_dummies(xy,4)