R: Functions for drawing ellipses and ellipse-like confidence...

ellipse-package {ellipse} | 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.

[Package ellipse version 0.4.1 Index]