Hexagonal Grid or Tessellation
Construct a hexagonal grid of points, or a hexagonal tessellation.
hexgrid(W, s, offset = c(0, 0), origin=NULL, trim = TRUE) hextess(W, s, offset = c(0, 0), origin=NULL, trim = TRUE)
W |
Window in which to construct the hexagonal grid or tessellation.
An object of class |
s |
Side length of hexagons. A positive number. |
offset |
Numeric vector of length 2 specifying a shift of the hexagonal grid. See Details. |
origin |
Numeric vector of length 2 specifying the initial origin of the hexagonal grid, before the offset is applied. See Details. |
trim |
Logical value indicating whether to restrict the result to
the window |
hexgrid constructs a hexagonal grid of points
on the window W. If trim=TRUE (the default),
the grid is intersected with W so that all points lie
inside W. If trim=FALSE, then we retain all grid points
which are the centres of hexagons that intersect W.
hextess constructs a tessellation of hexagons
on the window W. If trim=TRUE (the default),
the tessellation is restricted to the interior of W,
so that there will be some fragmentary hexagons near the
boundary of W. If trim=FALSE, the tessellation
consists of all hexagons which intersect W.
The points of hexgrid(...) are the
centres of the tiles of hextess(...)
in the same order.
In the initial position of the grid or tessellation,
one of the grid points (tile centres) is placed at the
origin, which defaults to the midpoint of the
bounding rectangle of W. The grid can be shifted
relative to this origin by specifing the offset.
The value of hexgrid is a point pattern (object of class
"ppp").
The value of hextess is a tessellation (object of class "tess").
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk
if(interactive()) {
W <- Window(chorley)
s <- 0.7
} else {
W <- letterR
s <- 0.3
}
plot(hextess(W, s))
plot(hexgrid(W, s), add=TRUE)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.