This package contains ellipse drawing routines designed for pairwise confidence regions, including distorted ellipses for nonlinear regression regions. It also includes a routine "plotcorr" for plotting correlation matrices using ellipses.
You can install the released version of ellipse from CRAN with:
install.packages("ellipse")
This is a basic example which shows you how to solve a common problem:
library(ellipse)
## basic example code
The examples require the MASS, nls and ts packages.
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0.2.12 (Jan 2004) - Bug fix for missing values in plotcorr, doc error
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0.2.14 (Aug 2004) - Allowed separate colors for each ellipse in plotcorr and fixed some .Rd errors.
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0.2.15 (May 2005) - Allowed plotcorr to plot just upper or lower triangle of matrix.
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0.3.1 (June 2005) - Added NAMESPACE, package overview topic
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0.3.2 (Feb 2006) - Remove deprecated install.R
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0.3.3 (Nov 2006) - Nicer colors in plotcorr() example (from Gregor Gorjanc)
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0.3.4 (Nov 2006) - Update to strict test compliance
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0.3.5 (Sep 2007) - License clarification
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0.3.6 (Apr 2009) - Bug fix: ... was not being passed from methods to ellipse.default().
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0.3.7 (Mar 2012) - Minor fix (clean up DESCRIPTION file)
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0.3.8 (Apr 2013) - Minor fix (no more \synopsis tag in help)
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0.4.1 (Jan 2018) - At request of CRAN, added pairs() generic function to avoid clash with MASS::pairs.profile, and other minor cleanups.