init.incidence.matrix.full
initialize the matrix updated in
update.incidence.matrix.full
for the computation of the incidence
matrix of the full tree in incidence.matrix.full
.
init.incidence.matrix.full(phy)
Matrix of size ntaxa + Nnode.
Input tree.
The initialized matrix is squared of size ntaxa + Nnode. Each node represent its parental branch. A row corresponding to a tip i is initialized to a vector of zeros, with only entry i equal to one. (Branch ending at tip i is only in the i^th lineage)