as.mask

From spatstat v1.0-1 by Adrian Baddeley

Pixel Image Approximation of a Window

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

Keywords: spatial

Usage

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

Arguments

w: A window (object of class "owin").
eps: Width and height of a pixel.
dimyx: Two integers giving the pixel array dimensions

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 default is to set eps equal to 1/100 of the window width or height.

There is no inverse of this function!

Value

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

Examples

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)

Documentation reproduced from package spatstat, version 1.0-1, License: GPL version 2 or newer

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