Given a weighted rooted tree tree, PathLengths() returns the distance from each vertex to each of its descendant vertices.

PathLengths(tree, fullMatrix = FALSE)

## Arguments

tree

Original tree of class phylo, in Preorder.

fullMatrix

Logical specifying return format; see "value" section.

## Value

If fullMatrix = TRUE, PathLengths() returns a square matrix in which entry [i, j] denotes the distance from internal node i to the descendant vertex j. Vertex pairs without a continuous directed path are denoted NA. If fullMatrix = FALSE, PathLengths() returns a data.frame with three columns: start lists the deepest node in each path (i.e. that closest to the root); end lists the shallowest node (i.e. that closest to a leaf); length lists the total length of that path.

Other tree properties: ConsensusWithout(), NSplits(), NTip(), SplitsInBinaryTree(), TipLabels(), TreeIsRooted()

## Examples

tree <- rtree(6)
plot(tree)
nodelabels()
tiplabels()

PathLengths(tree)
#>    start end     length
#> 1      7   1 0.20269226
#> 2      7   2 1.07830166
#> 3      8   2 0.36718043
#> 4      9   2 0.24548851
#> 5      7   3 1.21574694
#> 6      8   3 0.50462572
#> 7      9   3 0.38293379
#> 8     10   3 0.23962942
#> 9      7   4 1.03505190
#> 10     8   4 0.32393068
#> 11     9   4 0.20223876
#> 12    10   4 0.05893438
#> 13     7   5 2.22967869
#> 14     8   5 1.51855747
#> 15    11   5 0.87626921
#> 16     7   6 2.13232416
#> 17     8   6 1.42120294
#> 18    11   6 0.77891468
#> 19     7   8 0.71112122
#> 20     7   9 0.83281314
#> 21     8   9 0.12169192
#> 22     7  10 0.97611752
#> 23     8  10 0.26499630
#> 24     9  10 0.14330438
#> 25     7  11 1.35340948
#> 26     8  11 0.64228826
`