Samples what event to happen next
DAISIE_sample_event_trait_dep(rates)numeric indicating what event will happen, or a supposed event that would happen in some timesteps of the ontogeny algorithm.
[1]: immigration event with trait1
[2]: extinction event with trait1
[3]: cladogenesis event with trait1
[4]: anagenesis event with trait1
[5]: transition event with trait1
[6]: immigration event with trait2
[7]: extinction event with trait2
[8]: cladogenesis event with trait2
[9]: anagenesis event with trait2
[10]: transition event with trait2
named list of numeric rates as returned by
update_rates().
Shu Xie