dendextend (version 1.1.2)

nnodes: Counts the number of nodes (Vertices) in a tree

Description

Counts the number of nodes in a tree (dendrogram, hclust, phylo).

Usage

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

Value

• The number of leaves in the tree

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.

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