, circular fixed area plots
(<code>"fixed.area"</code>) are plots with a circular area defined by
the plot radius (in m). The size of k-tree plots (<code>"k.tree"</code>)
is determined by the number of trees (k) that enter the plot. The basal
area factor (BAF in m<span class="math inline">\(^2\)</span>/ha) defines
the size of angle-count plots (<code>"angle.count"</code>). The
parameters <code>radius</code>, <code>k</code> and <code>BAF</code> have
to be specified as data frame in <code>plot.parameters</cod