VizOR (version 0.8-5)

droplevels.colored: Drop unused levels from a colored factor

Description

Drop unused levels from a colored factor and its color key

Usage

"droplevels"(x, ...)

Arguments

x

a colored factor

...

further arguments passed to methods

Value

a colored factor with no unused levels

Details

This subclass method extends droplevels.factor to handle updating of the special color key attribute of colored factors.