The lollipop geom is used to create lollipop charts.
geom_lollipop(mapping = NULL, data = NULL, ..., horizontal = FALSE,
point.colour = NULL, point.size = NULL, na.rm = FALSE,
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
mapping if there is no plot mapping.
The data to be displayed in this layer. There are three
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.
function will be called with a single argument,
the plot data. The return value must be a
will be used as the layer data.
other arguments passed on to
layer. These are
often aesthetics, used to set an aesthetic to a fixed value, like
color = "red" or
size = 3. They may also be parameters
to the paired geom/stat.
FALSE (the default), the function
will draw the lollipops up from the X axis (i.e. it will set
TRUE, it wiill set
0). Make sure you map the
y aesthetics accordingly. This parameter helps avoid
the need for
the colour of the point
the size of the point
FALSE (the default), removes missing values with
a warning. If
TRUE silently removes missing values.
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
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.
Lollipop charts are the creation of Andy Cotgreave going back to 2011. They
are a combination of a thin segment, starting at with a dot at the top and are a
suitable alternative to or replacement for bar charts.
horizontal parameter to abate the need for
Arguments section for details).
A sample of the output from
geom_point() understands the following aesthetics (required aesthetics are in bold):
Learn more about setting these aesthetics in
df <- data.frame(trt=LETTERS[1:10],
value=seq(100, 10, by=-10))
ggplot(df, aes(trt, value)) + geom_lollipop()
ggplot(df, aes(value, trt)) + geom_lollipop(horizontal=TRUE)