Usage
discrete_scale(aesthetics, scale_name, palette, name = NULL,
breaks = waiver(), labels = waiver(), legend = NULL, limits = NULL,
expand = waiver(), na.value = NA, drop = TRUE, guide = "legend")
Arguments
aesthetics
the names of the aesthetics that this scale works with
scale_name
the name of the scale
palette
a palette function that when called with a single integer
argument (the number of levels in the scale) returns the values that
they should take
name
the name of the scale - used as the axis label or the legend
title
drop
drop unused factor levels from the scale (TRUE or
FALSE)
breaks
control the breaks in the guide. There are four possible
types of input:
NULL: don't display any breaks- a character vector giving the breaks as they should appear on the
axis or in the legend.
waiver()
limits
A character vector specifying the data range for the scale.
and the default order of their display in guides.
labels
NULL for no labels, waiver() for default
labels (labels the same as breaks), a character vector the same length
as breaks, or a named character vector whose names are used to match
replacement the labels for matching breaks.
legend
deprecated. Use guide instead.
expand
a numeric vector of length two, giving a multiplicative and
additive constant used to expand the range of the scales so that there
is a small gap between the data and the axes.
na.value
how should missing values be displayed?
guide
the name of, or actual function, used to create the
guide.