Earth: Multivariate Adaptive Regression Splines (MARS)
The earth package is an implementation of
Jerome Friedman's
Multivariate Adaptive Regression Splines, commonly known as "MARS".
What is MARS?
MARS is a statistical technique for modeling data.
It's an extension to linear regression that captures
nonlinearities and interactions between variables.
The
Wikipedia article
gives a good overview.
Download
Earth package for the R language.
Standalone C version for those who
want to call earth from their own software without requiring R.
A MATLAB interface is also provided (thanks to
Fred Nicolls).
This standalone version is based on earth version 3.2-6 (Nov 24, 2013).
General information on MARS
Wikipedia article (recommended)
Statsoft commercial vendor
Salford commercial vendor
Notes on the earth package document included with the R package
License
The earth source code is licensed under the GPL and runs in an R environment, or can be used as a stand-alone C library.
Earth is derived from the mda:mars library written by Trevor Hastie and Rob Tibshirani.
Citing earth
What people are using earth for
Earth is widely used.
Here's a small sample of what it's being used for.
(Note: This list was created in 2009 and is very out of date.)
Max Kuhn at
Pfizer
is using earth for building predictive models in
computational biology and chemistry.
You may also want to check out Max's
caret
package.
Thorsten Behrens
at the University of Tuebingen
(Institute of Geography) is using earth for Pedometrics / Digital Soil Mapping.
Trevor Nell at
Brolink (Pty) Ltd
is using earth to analyse insurance
claim data to determine appropriate premiums.
Kurt Salmela and Ming Shan of
Maritz Research
are using earth for
analyzing marketing research survey data.
Darin Brooks at the
University of British Columbia
and
Kim Forest Management Ltd
is using earth for predicting secondary growth/mid-term timber supply
in the BC forestry sector.
Internal Details
Timing tests
Internal data structures
Internal call graphs
Acknowledgments
The following people have contributed to
the earth package in one way or another.
Thanks guys!
I apologize to anyone that I may have inadvertently omitted.
Ahmed El-Gabbas,
Alan Mitchell,
Albert Bruehl,
Alexios Ghalanos,
Ana Ruize Navarro,
Andrew Nunn,
Andrew Wright,
Andrew Ziem,
Bernard Nolan,
Blazej Poplawski,
Ceyda Yazici,
Chenhui Liu,
Chris Billingham,
Chris Wilkinson,
Christos Giannoulis,
Dan Putler,
Daniel Zwick,
Darin Brooks,
David Lorenz,
David Marra,
David Smith,
Dima Adiangga,
Dirk Eddelbuettel,
Donald Misquitta,
Dylan R Harp,
Esteban Alfaro Cortes,
Eugene Shaine Mednikov,
Frank Breiner,
Frauke Guenther,
Fred Nicolls,
Gabor Grothendieck,
Gaia Bazzi,
Gavin Simpson,
Gijs Koppers,
Glen Lickjiff,
Glenda Mathews,
Glenn Eanes,
Graham Wilkes,
Graham Williams,
Greg Jensen,
Gregor Schmitz,
Gregory Boivin,
Hadley Wickham,
Hamid Reza Pourghasemi,
Hari Titan,
Heping Zhang,
Ilmari Juutilainen,
Jakub Stoklosa,
Jane Shevtsov,
Jason Roberts,
Jason Venkiteswaran,
Jerome Friedman,
Jim Leek,
Joe Retzer,
Jonathan Judge,
Joshua Hartshorne,
Juan Cardelino,
Julian Faraway,
Kamil Rakocy,
Kari Ruohonen,
Keith Woolner,
Kevin Ummel,
Kurt Hornik,
Kurt Salmela,
Kyra Stull,
Lara E Bauman,
Laura Villanova,
Louise Corron,
Manoj Semwal,
Marc Richter,
Marcelo Cunha,
Maria Chikina,
Marick Sinay,
Mark Scarr,
Marko Robnik Sokonja,
Martin Maechler,
Martin Renner,
Mattia Brambilla,
Mauro Gobbi,
Max Kuhn,
Ming Shan,
Natali Uhl,
Olaf Mersmann,
Paul Johnson,
Paval Goldstein,
Peter Dalgaard,
Pierric de Laborie,
Qianyi Zhang,
Rasi Matus,
Rob Tibshirani,
Sacha Varin,
Semih Kuter,
Serap Bilia,
Seth White,
Stephen Peplow,
Steve Miller,
Tal Galili,
Ted Lewis,
Thomas A Brandenburger,
Thorsten Behrens,
Tiina Hakanen,
Tim Hesterberg,
Tobia Ahsendorf,
Tony Corke,
Tood Rudick,
Trevor Hastie,
Trevor Nell,
Uwe Ligges,
Xianjun Dong,
Yanwen Chen,
Zanru Zhang,
Zhiqiang Yang
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