Phylogenetic trees depict the evolutionary relationships between different species. Each branch in a phylogenetic tree represents a period of evolutionary history. Species that are connected to the same branch both share that same period of evolutionary history. This function creates a matrix that shows which species are connected with branch. In other words, it creates a matrix that shows which periods of evolutionary history each species have experienced.
branch_matrix(x) # S3 method for default branch_matrix(x) # S3 method for phylo branch_matrix(x)
dgCMatrix sparse matrix object. Each row
corresponds to a different species. Each column corresponds to a different
branch. Species that inherit from a given branch are denoted with a one.