spatstat (version 1.32-0)

plot.colourmap: Plot a Colour Map

Description

Displays a colour map as a colour ribbon

Usage

## S3 method for class 'colourmap':
plot(x, ...,
       main, xlim = NULL, ylim = NULL, vertical = FALSE, axis = TRUE,
       labelmap=NULL)

Arguments

x
Colour map to be plotted. An object of class "colourmap".
...
Graphical arguments passed to image.default or axis.
main
Main title for plot. A character string.
xlim
Optional range of x values for the location of the colour ribbon.
ylim
Optional range of y values for the location of the colour ribbon.
vertical
Logical flag determining whether the colour ribbon is plotted as a horizontal strip (FALSE) or a vertical strip (TRUE).
axis
Logical flag determining whether an axis should be plotted showing the numerical values that are mapped to the colours.
labelmap
Function. If this is present, then the labels on the plot, which indicate the input values corresponding to particular colours, will be transformed by labelmap before being displayed on the plot. Typically used to simplify or shor

Value

  • None.

Details

This is the plot method for the class "colourmap". An object of this class (created by the function colourmap) represents a colour map or colour lookup table associating colours with each data value.

The command plot.colourmap displays the colour map as a colour ribbon. This plot can be useful on its own to inspect the colour map.

To annotate an existing plot with an explanatory colour ribbon, specify add=TRUE and use the arguments xlim and/or ylim to control the physical position of the ribbon on the plot.

See Also

colourmap

Examples

Run this code
co <- colourmap(rainbow(100), breaks=seq(-1,1,length=101))
  plot(co)
  plot(co, vertical=TRUE)
  ca <- colourmap(rainbow(8), inputs=letters[1:8])
  plot(ca, col.ticks="pink")

Run the code above in your browser using DataCamp Workspace