as.colourmap {spatstat.geom}

R Documentation

Convert to Colour Map

Description

Convert some other kind of data to a colour map.

Usage

  as.colourmap(x, ...)

  ## S3 method for class 'colourmap'
as.colourmap(x, ...)

  ## S3 method for class 'symbolmap'
as.colourmap(x, ...)

Arguments

x	Data to be converted to a colour map. An object of class "symbolmap", "colourmap" or some other kind of suitable data.
...	Other arguments passed to methods.

Details

If x contains colour map information, it will be extracted and returned as a colour map object. Otherwise, NULL will be returned.

Value

A colour map (object of class "colourmap") or NULL.

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

colourmap

Examples

  m <- pHcolourmap(c(3,8))
  g <- symbolmap(pch=21, bg=m, size=function(x){ 1.1 * x }, range=c(3,8))
  opa <- par(mfrow=c(1,2))
  plot(g, vertical=TRUE)
  plot(as.colourmap(g), vertical=TRUE)
  par(opa)

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