Waterfall Dendrogram

Draws an alternative to the dendrogram using cpcp coordinates. Colors according to a specific number of clusters make the interpretation easier. Also splits which follow each other within a margin of min.gap (proportion of maximum height) can be displayed by boxes.

dendro(x, k = 30, color.id = k - 2, label = FALSE, opts = list(),
 min.gap = 0.01, spline = FALSE, ...)

Arguments

x	A hierarchical clustering object.
k	The maximum number of clusters to plot. Possible are values up to N-1 but should usually be smaller.
color.id	The number of clusters for the coloring.
label	Whether or not to draw observation labels. Makes sense for small datasets.
opts	Graphics and colour parameters such as lwd, ps or alpha.
min.gap	Joins which are closer than min.gap from each other will be packed and displayed as a box.
spline	Whether or not to use spline curves instead of straight line connections between the points.
…	dots

Value

TRUE

Examples

# NOT RUN {
library(amap)
hc <- hcluster(USArrests)
# the full plot:
dendro(hc, k = 24, min.gap = 0.00)

# aggregation splits within 0.02 maximum height
dendro(hc, k = 24, min.gap = 0.02)

# the same graphic with spline curves instead of straight lines.
dendro(hc, k = 24, min.gap = 0.02, spline = TRUE)

# olive oil data
sx <- scale(olives[,-c(1,2,11)])
hc <- hcluster(sx)
plot(hc)
dendro(hc, 120, color.id = 6, min.gap=0.005)
dendro(hc, 120, color.id = 6, min.gap=0.1)

dendro(hc, 120, color.id = 6, min.gap=0.1, spline = TRUE)
# }