The function boxplot.mvabund
allows simultaneous construction of many
variables on a single figure. Thus a good comparative overview about the
distribution of abundances for several species can be obtained.
There are several ways in which this function can be used.
If one mvabund
object, either named x
or y
or not names, is passed, it will be drawn on one plot and abundances can be
compared over several variables.
If two mvabund
objects, named x
and y
are
passed for plotting, they will be shown on
one plot, showing for each species the abundances of both objects directly
one below the other.
If more than two mvabund
objects are passed, each of them will be
plotted separately.
Additionally, it is possible to specify x
as a list of mvabund
objects.
Each of them will be plotted separately and any further mvabund
data will
be ignored, regardless if it is specified as y
or unnamed.
The function boxplot.mvformula
can be used to draw boxplots of a mvabund
object in dependence of explanatory variables. The explanatory variables can be both
numerical values as well as factor variables. If the formula contains both of them,
there will be separate plots for the terms with numerical values and the terms
with factor variables, displayed on separate windows.
The arguments plot
, varwidth
and add
, which are availabe in the default method of boxplot
, are not available for the mvabund
and mvformula
methods. The argument horizontal
is not available for the mvabund
method.
A number of other arguments like at
and names
are only available for the
mvabund
method.