This layout sets the heights of the branch points to be the maximum distance
to a leaf. In this way the branch points are spread out evenly in the
y-direction. After modifying the height it calls
layout_dendrogram_dendrogram
.
layout_dendrogram_even(graph, ...)
A dendrogram object
parameters passed on to layout_dendrogram_dendrogram
A data.frame as layout_dendrogram_dendrogram