A student of mine is analyzing whether the rates of evolution of a continuous 
trait depend on the state of a discrete trait. He finds no support for a model 
with different rates of evolution. However, we would like to test how different 
the rates would have to be in order for the method to support a two-rate model. 
Thus I would like to know how we could simulate trait evolution for the 
continuous trait with rates differing depending on the state of the discreet 

Any suggestions are greatly appreciated.

Best wishes,


Dr Alejandro Gonzalez Voyer
Newton Advanced Fellow
Investigador Titular B

Laboratorio de Conducta Animal
Instituto de Ecología
Circuito Exterior S/N
Ciudad Universitaria
Universidad Nacional Autónoma de México
México, D.F.

Tel: +52 55 5622 9044
E-mail: alejandro.gonza...@iecologia.unam.mx

Lab website: www.alejandrogonzalezvoyer.com

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