plot_rule: Plots the line that defines a rule
In ropensci/pixelclasser: Classifies Image Pixels by Colour

Description Usage Arguments Details Value See Also Examples

This function draws the line that defines a rule on the plot created by plot_rgb_plane().

1	plot_rule(rule, label = "", ...)

`rule`	an object of class `pixel_rule` produced by `define_rule()`.
`label`	a string to label the line. It is attached at the coordinates of the second point used to define the line.
`...`	additional graphical parameters passed to the underlying `lines()` function, for example to define the line colour or dashing style. They are also used for the line label.

The function uses the information stored in the pixel_rule object to plot the line.

Use the ... to set the colour and other characteristics of the line. Use any character string understood by col2rgb().

Labels can be added to the rule using label_rule().

The function does not return any value.

plot_rgb_plane, define_rule, label_rule col2rgb

rule_01 <- define_rule("rule_01", "g", "b",
                      list(c(0.345, 1/3), c(0.40, 0.10)), "<")

plot_rgb_plane("g", "b")
plot_rule(rule_01, col = "green")