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 brea
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.