Calculates the weightings for ILR coordinates based on branch lenghts of a phylogenetic tree via a few different methods (see details).
calculate.blw(tree, method = "sum.children")
options include: (default)
ILR balances built from a binary partition of a phylogenetic tree
can be imbued with branch length information. This function is helpful in
calculating those weightings.
There are a number of methods for calculating these weightings, the default
'sum.children' calculates the weighting for a given balance as the sum
of its two direct children's branch length. An alternative that has been as yet less
'mean.descendants' to calculate the weighting for a given balance
as the sum of its two direct children's branch lengths PLUS for each child the average
distance from it to its descendant tips.
Note: That some trees contain tips with branch lengths of zero length. This can result in that tip being unreasonably downweighted, as such this function automatically adds a small pseudocount to those tips with zero length (equal to the smallest non-zero) branch length on the tree.
vector of weightings for ILR coordinates produced via specified method.
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