R: Farthest Distance to Boundary of Window

fardist {spatstat.geom} | R Documentation

## Farthest Distance to Boundary of Window

### Description

Computes the farthest distance from each pixel, or each data point, to the boundary of the window.

### Usage

      fardist(X, ...)

      ## S3 method for class 'owin'
    fardist(X, ..., squared=FALSE)

      ## S3 method for class 'ppp'
    fardist(X, ..., squared=FALSE)

### Arguments

`X` | A spatial object such as a window or point pattern.
`...` | Arguments passed to `as.mask` to determine the pixel resolution, if required.
`squared` | Logical. If `TRUE`, the squared distances will be returned.

### Details

The function `fardist` is generic, with methods for the classes `owin` and `ppp`.

For a window `W`, the command `fardist(W)` returns a pixel image in which the value at each pixel is the largest distance from that pixel to the boundary of `W`.

For a point pattern `X`, with window `W`, the command `fardist(X)` returns a numeric vector with one entry for each point of `X`, giving the largest distance from that data point to the boundary of `W`.

### Value

For `fardist.owin`, a pixel image (object of class `"im"`).

For `fardist.ppp`, a numeric vector.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

Rolf Turner r.turner@auckland.ac.nz

and Ege Rubak rubak@math.aau.dk

### Examples

      fardist(cells)

      plot(FR <- fardist(letterR))

[Package spatstat.geom version 2.3-2 Index]