Compute the relative frequencies of state changes along edges


This function computes the relative frequencies of character state changes along edges from a sample of stochastically mapped character histories. This function assumes that all trees in the sample differ only in their mapped histories & not at all in topology or branch lengths. Note that it only asks whether the starting and ending states of the edge differ in a particular way, and thus ignores multiple-hits along a single edge.





an object of class "multiSimmap" containing a sample of trees that are identical in topology & branch lengths with different stochastically mapped character histories.


The object that is returned is a matrix with the state changes & the relative frequency of each state change. Rows are in the order of the matrix edge for any of the mapped trees.


Liam Revell


Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.

See Also


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