balance                 package:ape                 R Documentation

_B_a_l_a_n_c_e _o_f _a _D_i_c_h_o_t_o_m_o_u_s _P_h_y_l_o_g_e_n_e_t_i_c _T_r_e_e

_D_e_s_c_r_i_p_t_i_o_n:

     This function computes the balance of a phylogenetic tree, that is
     for each node of the tree the numbers of descendants (i.e. tips)
     on each of its daughter-branch. The tree must be fully
     dichotomous.

_U_s_a_g_e:

     balance(phy)

_A_r_g_u_m_e_n_t_s:

     phy: an object of class '"phylo"'.

_V_a_l_u_e:

     a numeric matrix with two columns and one row for each node of the
     tree. The columns give the numbers of descendants on each
     daughter-branches (the order of both columns being arbitrary). If
     the phylogeny 'phy' has an element 'node.label', this is used as
     rownames for the returned matrix; otherwise the numbers (of mode
     character) of the matrix 'edge' of 'phy' are used as rownames.

_A_u_t_h_o_r(_s):

     Emmanuel Paradis paradis@isem.univ-montp2.fr

_R_e_f_e_r_e_n_c_e_s:

     Aldous, D. J. (2001) Stochastic models and descriptive statistics
     for phylogenetic trees, from Yule to today. _Statistical Science_,
     *16*, 23-34.

