geom_area(mapping = NULL, data = NULL, stat = "identity", position = "stack", na.rm = FALSE, ...)
aes or aes_string. Only
needs to be set at the layer level if you are overriding
the plot defaults.FALSE (the default), removes
missing values with a warning. If TRUE silently
removes missing values.layer. This can include aesthetics whose
values you want to set, not map. See layer
for more details.An area plot is the continuous analog of a stacked bar
chart (see geom_bar), and can be used to
show how composition of the whole varies over the range
of x. Choosing the order in which different components
is stacked is very important, as it becomes increasing
hard to see the individual pattern as you move up the
stack.
An area plot is a special case of
geom_ribbon, where the minimum of the range
is fixed to 0, and the position adjustment defaults to
position_stacked.
# see geom_ribbon