R: Reorder Levels of a Factor-Valued Image or Pattern

relevel.im {spatstat.geom} | R Documentation

## Reorder Levels of a Factor-Valued Image or Pattern

### Description

For a pixel image with factor values, or a point pattern with factor-valued marks, the levels of the factor are re-ordered so that the level `ref` is first and the others are moved down.

### Usage

      ## S3 method for class 'im'
    relevel(x, ref, ...)

      ## S3 method for class 'ppp'
    relevel(x, ref, ...)

      ## S3 method for class 'ppx'
    relevel(x, ref, ...)

### Arguments

`x` | A pixel image (object of class `"im"`) with factor values, or a point pattern (object of class `"ppp"`, `"ppx"`, `"lpp"` or `"pp3"`) with factor-valued marks.
`ref` | The reference level.
`...` | Ignored.

### Details

These functions are methods for the generic `relevel`.

If `x` is a pixel image (object of class `"im"`) with factor values, or a point pattern (object of class `"ppp"`, `"ppx"`, `"lpp"` or `"pp3"`) with factor-valued marks, the levels of the factor are changed so that the level specified by `ref` comes first.

### Value

Object of the same kind as `x`.

### 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

`mergeLevels`

### Examples

      amacrine
      relevel(amacrine, "on")

[Package spatstat.geom version 2.3-2 Index]