Performs a coalescent node merge move (Ewing et al. 2004). Merges two migration
nodes immediately below a coalescent node and place above coalescent node
Usage
coalescent_merge(ED, n_deme, node_indices)
Arguments
- ED
Extended data object; matrix with columns Node ID, parent, child 1, child 2, deme, node age
- n_deme
Number of distinct demes in the population
- node_indices
Vector giving row indices for node labels
Value
Updated extended data object with the proposal from the migration pair birth move