nearest.raster.point

From spatstat v1.0-1 by Adrian Baddeley

Find Pixel Nearest to a Given Point

Given cartesian coordinates, find the nearest pixel.

Keywords: spatial

Usage

nearest.raster.point(x,y,w)

Arguments

x: Numeric vector of $x$ coordinates of any points
y: Numeric vector of $y$ coordinates of any points
w: A window (an object of class "owin") of type "mask" representing a binary pixel image.

Details

The argument w should be a window (an object of class "owin", see owin.object for details). A window of type "mask" represents a binary pixel image.

This function returns a list containing two vectors rr and cc giving row and column positions (in the image matrix). For the location (x[i],y[i]) the nearest pixel is at row rr[i] and column cc[i] of the image.

Value

List containing two vectors rr and cc giving row and column positions (in the image matrix).

Examples

library(spatstat)
  w <- owin(c(0,1), c(0,1), mask=matrix(T, 100,100))  # 100 x 100 grid
  nearest.raster.point(0.5, 0.3, w)

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

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