ggdendro (version 0.1-12)

dendro_data.dendrogram: Extract line segment and label data from dendrogram or hclust object.

Description

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

Usage

## S3 method for class 'dendrogram':
dendro_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

ggdendrogram Other dendro_data methods: dendro_data.tree, dendrogram_data Other dendrogram/hclust functions: dendrogram_data

Examples

require(ggplot2)
#
# Demonstrate dendro_data.dendrogram
#
hc <- hclust(dist(USArrests), "ave")
dhc <- as.dendrogram(hc)
# Rectangular lines
ddata <- dendro_data(dhc, type="rectangle")
ggplot(segment(ddata)) + geom_segment(aes(x=x, y=y, xend=xend, yend=yend)) +
		coord_flip() + scale_y_reverse(expand=c(0.2, 0)) + theme_dendro()
# Triangular lines
ddata <- dendro_data(dhc, type="triangle")
ggplot(segment(ddata)) + geom_segment(aes(x=x, y=y, xend=xend, yend=yend)) + theme_dendro()
#
# Demonstrate dendro_data.hclust
#
require(ggplot2)
hc <- hclust(dist(USArrests), "ave")
# Rectangular lines
hcdata <- dendro_data(hc, type="rectangle")
ggplot(segment(hcdata)) + geom_segment(aes(x=x, y=y, xend=xend, yend=yend)) +
   coord_flip() + scale_y_reverse(expand=c(0.2, 0)) + theme_dendro()
# Triangular lines
hcdata <- dendro_data(hc, type="triangle")
ggplot(segment(hcdata)) + geom_segment(aes(x=x, y=y, xend=xend, yend=yend)) +
  theme_dendro()