cordillera (version 1.0-3)

cordillera-package: cordillera: The OPTICS Cordillera

Description

A package for calculating the OPTICS Cordillera. The package contains various functions, methods and classes for calculating and plotting the OPTICS Cordillera and an interface to ELKI's OPTICS.

Author

Maintainer: Thomas Rusch (ORCID)

Other contributors:

• Patrick Mair (ORCID) [contributor]

• Kurt Hornik (ORCID) [contributor]

Details

The stops package provides these main functions:

• cordillera() ... OPTICS Cordillera using dbscan OPTICS implementation

Methods: For most of the objects returned by the high-level functions S3 classes and methods for standard generics were implemented, including print, summary, plot.

References:

• Rusch, T., Hornik, K., & Mair, P. (2018) Assessing and quantifying clusteredness: The OPTICS Cordillera, Journal of Computational and Graphical Statistics. 27 (1), 220-233. tools:::Rd_expr_doi("10.1080/10618600.2017.1349664")

Authors: Thomas Rusch

Maintainer: Thomas Rusch

See Also

Useful links:

• https://r-forge.r-project.org/projects/stops/

Examples

data(CAClimateIndicatorsCountyMedian)

res<-princomp(CAClimateIndicatorsCountyMedian[,3:52])
res
summary(res)

library(scatterplot3d)
scatterplot3d(res$scores[,1:3])

irisrep3d<-res$scores[,1:3]
irisrep2d<-res$scores[,1:2]


#OPTICS in dbscan version
library(dbscan)
ores<-optics(irisrep2d,minPts=15,eps=100)
plot(ores)
#OPTICS cordillera for the 2D representation
cres2d<-cordillera(irisrep2d,minpts=15)
cres2d
summary(cres2d)
plot(cres2d)

#OPTICS cordillera for the 3D representation
cres3d<-cordillera(irisrep3d,minpts=15)
cres3d
summary(cres3d)
plot(cres3d)