LPCM-package: Local principal curve methods

Description Details Acknowledgements Author(s) References See Also


Fitting multivariate data patterns with local principal curves; including simple tools for data compression (projection), bandwidth selection, and measuring goodness-of-fit.

This package implements the techniques introduced in Einbeck, Tutz & Evers (2005), and successive related papers.

The main functions to be called by the user are

This package also contains some code for density mode detection (‘local principal points’) and mean shift clustering (as well as bandwidth selection in this context), which implements the methods presented in Einbeck (2011). See the help file for ms.

A second R package which will implement the extension of local principal curves to local principal surfaces and manifolds, as proposed in Einbeck, Evers & Powell (2010), is in preparation.


Package: LPCM
Type: Package
License: GPL (>=2)
LazyLoad: yes


Contributions (in form of pieces of code, or useful suggestions for improvements) by Jo Dwyer, Mohammad Zayed, and Ben Oakley are gratefully acknowledged.


Jochen Einbeck and Ludger Evers

Maintainer: Jochen Einbeck <[email protected]>


Einbeck, J., Tutz, G., & Evers, L. (2005): Local principal curves, Statistics and Computing 15, 301-313.

Einbeck, J., Evers, L., & Powell, B. (2010): Data compression and regression through local principal curves and surfaces, International Journal of Neural Systems, 20, 177-192.

Einbeck, J. (2011): Bandwidth selection for nonparametric unsupervised learning techniques – a unified approach via self-coverage. Journal of Pattern Recognition Research 6, 175-192.

See Also

pcurve, princurve

LPCM documentation built on May 29, 2017, 12:19 p.m.