\docType{package}
\name{granovaGG}
\alias{"granovaGG-package"}
\alias{granovaGG}
\title{Elemental Graphics for Analysis of Variance Using ggplot2}
\description{
This small collection of functions provides what we call
elemental graphics for display of anova results. The term
elemental derives from the fact that each function is
aimed at construction of graphical displays that afford
direct visualizations of data with respect to the
fundamental questions that drive the particular anova
methods. The two main functions are granova.1w (a graphic
for one way anova) and granova.2w (a corresponding
graphic for two way anova). These functions were written
to display data for any number of groups, regardless of
their sizes (however, very large data sets or numbers of
groups can be problematic). For these two functions a
specialized approach is used to construct data-based
contrast vectors for which anova data are displayed. The
result is that the graphics use straight lines, and when
appropriate flat surfaces, to facilitate clear
interpretations while being faithful to the standard
effect tests in anova. The graphic results are
complementary to standard summary tables for these two
basic kinds of analysis of variance; numerical summary
results of analyses are also provided as side effects.
Two additional functions are granova.ds (for comparing
two dependent samples), and granova.contr (which provides
graphic displays for a priori contrasts). All functions
provide relevant numerical results to supplement the
graphic displays of anova data. The graphics based on
these functions should be especially helpful for learning
how the methods have been applied to answer the
question(s) posed. This means they can be particularly
helpful for students and non-statistician analysts. But
these methods should be quite generally helpful for
work-a-day applications of all kinds, as they can help to
identify outliers, clusters or patterns, as well as
highlight the role of non-linear transformations of data.
In the case of granova.1w and granova.ds especially,
several arguments are provided to facilitate flexibility
in the construction of graphics that accommodate diverse
features of data, according to their corresponding
display requirements. See the help files for individual
functions.
}
\details{
\tabular{ll}{ Package: \tab granovaGG\cr Version: \tab
1.0\cr License: \tab GPL (>= 2)\cr }
}
\author{
Brian A. Danielak \email{brian@briandk.com}
Robert M. Pruzek \email{RMPruzek@yahoo.com}
William E. J. Doane \email{wil@drdoane.com}
James E. Helmreich \email{James.Helmreich@Marist.edu}
Jason Bryer \email{jason@bryer.org}
}
\seealso{
\code{\link{granovagg.1w}} \code{\link{granovagg.ds}}
\code{\link{granovagg.contr}}
}
\keyword{hplot}