spatstat.geom (version 3.3-5)

regularpolygon: Create A Regular Polygon

Description

Create a window object representing a regular (equal-sided) polygon.

Usage

regularpolygon(n, edge = 1, centre = c(0, 0), ...,
               align = c("bottom", "top", "left", "right", "no"))
hexagon(edge = 1, centre = c(0,0), ...,
        align = c("bottom", "top", "left", "right", "no"))

Value

A window (object of class "owin").

Arguments

n

Number of edges in the polygon.

edge

Length of each edge in the polygon. A single positive number.

centre

Coordinates of the centre of the polygon. A numeric vector of length 2, or a list(x,y) giving the coordinates of exactly one point, or a point pattern (object of class "ppp") containing exactly one point.

align

Character string specifying whether to align one of the edges with a vertical or horizontal boundary.

...

Ignored.

Author

Adrian Baddeley , Rolf Turner and Ege Rubak .

Details

The function regularpolygon creates a regular (equal-sided) polygon with n sides, centred at centre, with sides of equal length edge. The function hexagon is the special case n=6.

The orientation of the polygon is determined by the argument align. If align="no", one vertex of the polygon is placed on the $x$-axis. Otherwise, an edge of the polygon is aligned with one side of the frame, specified by the value of align.

See Also

disc, ellipse, owin.

hextess for hexagonal tessellations.

Examples

  plot(hexagon())
  plot(regularpolygon(7))
  plot(regularpolygon(7, align="left"))