# plot.symbolmap

From spatstat v1.42-2
by Adrian Baddeley

##### Plot a Graphics Symbol Map

Plot a representation of a graphics symbol map, similar to a plot legend.

##### Usage

```
## S3 method for class 'symbolmap':
plot(x, \dots, main, xlim = NULL, ylim = NULL,
vertical = FALSE,
side = c("bottom", "left", "top", "right"),
annotate = TRUE, labelmap = NULL, add = FALSE)
```

##### Arguments

- x
- Graphics symbol map (object of class
`"symbolmap"`

). - ...
- Additional graphics arguments passed to
`points`

,`symbols`

or`axis`

. - main
- Main title for the plot. A character string.
- xlim,ylim
- Coordinate limits for the plot. Numeric vectors of length 2.
- vertical
- Logical. Whether to plot the symbol map in a vertical orientation.
- side
- Character string specifying the position of the text that annotates the symbols.
- annotate
- Logical. Whether to annotate the symbols with labels.
- labelmap
- Transformation of the labels. A function or a scale factor which will be applied to the data values corresponding to the plotted symbols.
- add
- Logical value indicating whether to add the plot to the
current plot (
`add=TRUE`

) or to initialise a new plot.

##### Details

A graphics symbol map is an association between data values and graphical symbols.

This command plots the graphics symbol map itself, in the style of a plot legend.

##### Value

- None.

##### See Also

`symbolmap`

to create a symbol map.
`invoke.symbolmap`

to apply the symbol map to some data
and plot the resulting symbols.

##### Examples

```
g <- symbolmap(inputs=letters[1:10], pch=11:20)
plot(g)
g2 <- symbolmap(range=c(-1,1),
shape=function(x) ifelse(x > 0, "circles", "squares"),
size=function(x) sqrt(ifelse(x > 0, x/pi, -x)),
bg = function(x) ifelse(abs(x) < 1, "red", "black"))
plot(g2, vertical=TRUE, side="left", col.axis="blue", cex.axis=2)
```

*Documentation reproduced from package spatstat, version 1.42-2, License: GPL (>= 2)*

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