spatstat (version 1.3-1)

as.mask: Pixel Image Approximation of a Window

Description

Obtain a discrete (pixel image) approximation of a given window

Usage

as.mask(w, eps=NULL, dimyx=NULL)

Arguments

w
A window (object of class "owin").
eps
(optional) width and height of pixels.
dimyx
(optional) pixel array dimensions

Value

  • A window (object of class "owin") of type "mask" representing a binary pixel image.

Details

The shape of the window w will be approximated by a binary pixel image. See owin.object for explanation of binary image masks.

The pixel raster will be an $m \times n$ rectangular grid where $m, n$ are given by dimyx[2], dimyx[1] respectively (if the argument dimyx is given) or by the constraint that pixel widths and heights should be approximately eps. If neither eps nor dimyx is given, the pixel raster dimensions are obtained from spatstat.options("npixel").

There is no inverse of this function!

See Also

owin.object, as.rectangle, spatstat.options

Examples

Run this code
library(spatstat)
  w <- owin(c(0,10),c(0,10), poly=list(x=c(1,2,3,2,1), y=c(2,3,4,6,7)))
  plot(w)
  m <- as.mask(w)
  plot(m)

Run the code above in your browser using DataCamp Workspace