as.mask

0th

Percentile

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
(optional) width and height of pixels.
dimyx
(optional) 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 pixel raster dimensions are obtained from spatstat.options("npixel").

There is no inverse of this function!

Value

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

See Also

owin.object, as.rectangle, spatstat.options

• as.mask
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 1.4-5, License: GPL version 2 or newer

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