nnodes {dendextend} | R Documentation |
Counts the number of nodes (Vertices) in a tree
Description
Counts the number of nodes in a tree (dendrogram, hclust, phylo).
Usage
nnodes(x, ...)
## Default S3 method:
nnodes(x, ...)
## S3 method for class 'dendrogram'
nnodes(x, ...)
## S3 method for class 'hclust'
nnodes(x, ...)
## S3 method for class 'phylo'
nnodes(x, ...)
Arguments
x |
tree object (dendrogram or hclust) |
... |
not used |
Details
The idea for the name is from functions like ncol, and nrow.
The phylo method is based on turning the phylo to hclust and than to dendrogram. It may not work for complex phylo trees.
Value
The number of leaves in the tree
See Also
nrow, count_terminal_nodes, nleaves
Examples
hc <- hclust(dist(USArrests[1:5, ]), "ave")
dend <- as.dendrogram(hc)
nnodes(dend) # 9
nnodes(hc) # 9
[Package dendextend version 1.17.1 Index]