R: Functions for drawing ellipses and ellipse-like confidence...
ellipse-package
R Documentation
Functions for drawing ellipses and ellipse-like confidence
regions
Description
This package contains various routines for drawing
ellipses and ellipse-like confidence regions, implementing the
plots described in Murdoch and Chow (1996).
There are also routines implementing
the profile plots described in Bates and Watts (1988).
Details
There are three groups of routines in the ellipse package. The first
consists of those involved with plotcorr, which implements the plots
described in Murdoch and Chow (1996). These display correlations using
ellipses, whose shape is that of the contours of a bivariate normal
distribution with matching correlation.
The second group implements a version of the profile plots described in
Bates and Watts (1988); see ellipse.profile and pairs.profile.
The last group provide the basis for the others, drawing ellipses based on
various S objects, including scalar correlations, covariance matrices
arima, lm, and nls fits: see ellipse.
Author(s)
Duncan Murdoch <murdoch@stats.uwo.ca> and E. D. Chow (porting
to R by Jesus M. Frias Celayeta <iosu@bureau.ucc.ie>)
Maintainer: Duncan Murdoch <murdoch@stats.uwo.ca>
References
Bates, D.M. and Watts, D.G. (1988).
Nonlinear Regression Analysis and its Applications. Wiley.
Murdoch, D.J. and Chow, E.D. (1996). A graphical
display of large correlation matrices. The American
Statistician 50, 178-180.