cluster_data.dendrogram: Extract line segment and label data from dendrogram object.

In pentalibra/ggcluster: Tools for creating cluster plots, tree plots and dendrograms using ggplot.

Description

Extract line segment and label data from dendrogram object. Results are stored in a list of data frames containing line segment data and label data.

Usage

  ## S3 method for class 'dendrogram'
 cluster_data(model, type =
  c("rectangle", "triangle"), ...)

Arguments

model	object of class "dendrogram", e.g. the output of as.dendrogram()
type	The type of plot, indicating the shape of the dendrogram. "rectangle" will draw rectangular lines, while "triangle" will draw triangular lines.
...	ignored

Value

A list with the following elements:

segments	Line segment data
labels	Label data

See Also

cluster_data

Examples

require(ggplot2)
hc <- hclust(dist(USArrests), "ave")
dhc <- as.dendrogram(hc)
# Rectangular lines
ddata <- cluster_data(dhc, type="rectangle")
ggplot(ddata$segments) + geom_segment(aes(x=x0, y=y0, xend=x1, yend=y1)) +
coord_flip() + scale_y_reverse(expand=c(0.2, 0))
# Triangular lines
ddata <- cluster_data(dhc, type="triangle")
ggplot(ddata$segments) + geom_segment(aes(x=x0, y=y0, xend=x1, yend=y1))

pentalibra/ggcluster documentation built on May 25, 2019, 12:46 a.m.