- mapping
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 mapping
if there is no plot
mapping.
- data
The data to be displayed in this layer. There are three
options:
If NULL
, the default, the data is inherited from the plot
data as specified in the call to ggplot()
.
A 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.
A function
will 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 function
can be created
from a formula
(e.g. ~ head(.x, 10)
).
- stat
The statistical transformation to use on the data for this
layer, as a string. The default (stat = 'fivenumber'
) calls
stat_fivenumber
and produces whiskers that extend
from the interquartile range to the extremes of the data; specifying
stat_boxplot
will produce a more traditional boxplot
with whiskers extending to the most extreme points that are < 1.5 IQR
away from the hinges (i.e., the first and third quartiles).
- position
Position adjustment, either as a string naming the adjustment
(e.g. "jitter"
to use position_jitter
), or the result of a call to a
position adjustment function. Use the latter if you need to change the
settings of the adjustment.
- outlier.colour
colour for outlying points
- outlier.shape
shape of outlying points
- outlier.size
size of outlying points
- outlier.stroke
stroke for outlying points
- voffset
controls the size of the gap in the line representing the
median when median.type = 'line'
. This is a fraction of the range
of y
.
- hoffset
controls how much the interquartile line is offset from the
whiskers when median.type = 'line'
. This is a fraction of the
range of x
.
- na.rm
If FALSE
, the default, missing values are removed with
a warning. If TRUE
, missing values are silently removed.
- show.legend
logical. Should this layer be included in the legends?
NA
, the default, includes if any aesthetics are mapped.
FALSE
never includes, and TRUE
always includes.
It can also be a named logical vector to finely select the aesthetics to
display.
- inherit.aes
If 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. borders()
.
- median.type
If 'point'
, then the median is represented by a
point, and the interquartile range by a gap in the line. If
median.type='line'
, then the interquartile range is represented by
a line, possibly offset, and the median by a gap in the line.
- whisker.type
If 'line'
, then whiskers are represented by lines.
If 'point'
, then whiskers are represented by points at
ymin
and ymax
.
- ...
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.