These functions plot ellipses (or ellipsoids in 3D) in canonical discriminant space representing the hypothesis and error sums-of-squares-and-products matrices for terms in a multivariate linear model. They provide a low-rank 2D (or 3D) view of the effects for that term in the space of maximum discrimination.
Usage
# S3 method for candiscList
heplot(mod, term, ask = interactive(), graphics = TRUE, ...)Arguments
- mod
A
candiscListobject for terms in amlm- term
The name of one term to be plotted for the
heplotandheplot3dmethods. If not specified, one plot is produced for each term in themlmobject.- ask
If
TRUE(the default), a menu of terms is presented; if ask is FALSE, canonical HE plots for all terms are produced.- graphics
if
TRUE(the default, when running interactively), then the menu of terms to plot is presented in a dialog box rather than as a text menu.- ...
Arguments to be passed down
References
Friendly, M. (2006). Data Ellipses, HE Plots and Reduced-Rank Displays for Multivariate Linear Models: SAS Software and Examples Journal of Statistical Software, 17(6), 1-42. https://www.jstatsoft.org/v17/i06/ doi:10.18637/jss.v017.i06 .
Friendly, M. (2007). HE plots for Multivariate General Linear Models. Journal of Computational and Graphical Statistics, 16(2) 421--444. http://datavis.ca/papers/jcgs-heplots.pdf, doi:10.1198/106186007X208407 .