plot.colourmap
From spatstat v1.19-2
by Adrian Baddeley
Plot a Colour Map
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)
Arguments
- x
- Colour map to be plotted. An object of class
"colourmap"
. - ...
- Graphical arguments passed to
image.default
. - 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.
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.
Value
- None.
See Also
Examples
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)
Community examples
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