geom_linerange
Geometry representing a vertical interval defined by x, ymin and
ymax. Each case draws a single graphical object.
Aesthetics
Similar Geometries
geom_crossbar,
geom_pointrange
Description and Details
Using the described geometry, you can insert a simple
geometric object into your data visualization – a
line defined by a position aesthetic parameters x,
ymin and ymax. You can find this geometry in the ribbon
toolbar tab Layers, under the 2D button.
Using this geometry, you can display a range of y values at a
defined value on the x-axis. We often use this geometry for
visualizing errors. For the following examples, we will use a
simple dataset consisting of five variables and four records.
We map the trt variable to the x axis. The ymin and ymax ranges
are mapped to the variables upper and lower. Finally, we map the
color aesthetic to the group variable. The result is shown in the
following plot.
Described geometry is often used when on the x-axis are mapped
categorical values. If you want to transform the numerical trt
variable to categorical, put it as an argument into the factor()
function. If you want to see the geometries "next to each other",
set the position property to dodge and specify the width parameter
to 0.3. The result is shown in the following figure.
