dbscan (version 1.1-2)

DS3: DS3: Spatial data with arbitrary shapes

Description

Contains 8000 2-d points, with 6 "natural" looking shapes, all of which have an sinusoid-like shape that intersects with each cluster.

Usage

data("DS3")

Format

A data frame with 8000 observations on the following 2 variables.

X

a numeric vector

Y

a numeric vector

Details

Originally used as a benchmark data set for the Chameleon clustering algorithm[1] to illustrate the a data set containing arbitrarily shaped spatial data surrounded by both noise and artifacts.

References

Karypis, George, Eui-Hong Han, and Vipin Kumar (1999). "Chameleon: Hierarchical clustering using dynamic modeling." Computer 32(8): 68-75.

Examples

# NOT RUN {
data(DS3)
plot(DS3, pch=20, cex=0.25)
# }