This makes a ribbon that is filled depending on whether the
min. This can be useful for displaying differences
between two series.
stat_difference( mapping = NULL, data = NULL, geom = "ribbon", position = "identity", ..., levels = c("+", "-", "0"), na.rm = FALSE, orientation = NA, show.legend = NA, inherit.aes = TRUE )
Set of aesthetic mappings created by
aes_(). If specified and
inherit.aes = TRUE(the default), it is combined with the default mapping at the top level of the plot. You must supply
mappingif there is no plot mapping.
The data to be displayed in this layer. There are three options:
NULL, the default, the data is inherited from the plot data as specified in the call to
data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See
fortify()for which variables will be created.
functionwill be called with a single argument, the plot data. The return value must be a
data.frame, and will be used as the layer data. A
functioncan be created from a
~ head(.x, 10)).
Position adjustment, either as a string, or the result of a call to a position adjustment function.
Other arguments passed on to
layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like
colour = "red"or
size = 3. They may also be parameters to the paired geom/stat.
character(3)indicating factor levels for the
fillaesthetic for the following cases (1)
max > min(2)
max < min(3)
max == min. Will be padded with
NAs when necessary.
FALSE, the default, missing values are removed with a warning. If
TRUE, missing values are silently removed.
The orientation of the layer. The default (
NA) automatically determines the orientation from the aesthetic mapping. In the rare event that this fails it can be given explicitly by setting
"y". See the Orientation section for more detail.
logical. Should this layer be included in the legends?
NA, the default, includes if any aesthetics are mapped.
FALSEnever includes, and
TRUEalways includes. It can also be a named logical vector to finely select the aesthetics to display.
FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g.
The stat may reorder the
group aesthetic to accommodate two
different fills for the signs of differences. The stat takes care to
interpolate a series whenever a crossover between
happens. This makes the ribbon not look stumpy at these crossovers.
geom_ribbon() understands the following aesthetics (required aesthetics are in bold):
Learn more about setting these aesthetics in
This geom treats each axis differently and, thus, can thus have two orientations. Often the orientation is easy to deduce from a combination of the given mappings and the types of positional scales in use. Thus, ggplot2 will by default try to guess which orientation the layer should have. Under rare circumstances, the orientation is ambiguous and guessing may fail. In that case the orientation can be specified directly using the
orientation parameter, which can be either
"y". The value gives the axis that the geom should run along,
"x" being the default orientation you would expect for the geom.