Number of nodes at each depth

Find the number of nodes at each depth in the tree

widths(tree)

Arguments

tree

a tree of class phylo or phylo4. The tree should be binary and rooted; if not it will be coerced into a binary rooted tree using multi2di, if possible.

Value

A vector of widths, where entry i is the number of nodes at depth i. There is a single node at depth 0 (the root) which is not included in the vector, for simplicity.

Author

Caroline Colijn c.colijn@imperial.ac.uk

Michelle Kendall michelle.louise.kendall@gmail.com

Examples

## Find the node widths in a random tree with 10 tips:
tree <- rtree(10)
tree$edge.length <- rep(1,18) # to make it easier to see the width and depths in the plot
plot(tree)

widths(tree)
#> 1 2 3 4 5 
#> 2 4 4 4 4