compute_diff_exp.BM: Compute differences of expectations between node and parent.
Description
compute_diff_exp
compute the differences of conditional expectations between all the
nodes and their parents.
Usage
compute_diff_exp.BM(phylo, conditional_law_X)
Arguments
conditional_law_X
result of function compute_E
Value
matrix p x nEdges containing, for each edge e finishing at node i,
the quantity E[Z_i|Y]-E[Z_pa(i)|Y].