R: Extrapolate Line Segments to Obtain Infinite Lines

extrapolate.psp {spatstat.geom} | R Documentation

## Extrapolate Line Segments to Obtain Infinite Lines

### Description

Given a spatial pattern of line segments, extrapolate the segments to infinite lines.

### Usage

    extrapolate.psp(x, ...)

### Arguments

`x` | Spatial pattern of line segments (object of class `"psp"`).
`...` | Ignored.

### Details

Each line segment in the pattern `x` is extrapolated to an infinite line, drawn through its two endpoints. The resulting pattern of infinite lines is returned as an object of class `"infline"`.

If a segment's endpoints are identical (so that it has zero length) the resulting infinite line is vertical (i.e. parallel to the y coordinate axis).

### Value

An object of class `"infline"` representing the pattern of infinite lines. See `infline` for details of structure.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.

### See Also

`psp`, `infline`

`midpoints.psp`, `lengths_psp` `angles.psp`, `endpoints.psp`.

### Examples

       X <- psp(runif(4), runif(4), runif(4), runif(4), window=owin())
       Y <- extrapolate.psp(X)
       plot(X, col=3, lwd=4)
       plot(Y, lty=3)
       Y

[Package spatstat.geom version 2.3-2 Index]