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
andcc
giving row and column positions (in the image matrix).
See Also
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)
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