Graphical analysis of one-way ANOVA data. It allows visualization of the usual F-test.
GANOVA(dataset, var.equal=TRUE, type="QQ", center=TRUE, shift=0)
A QQ-plot or a histogram and rugplot
A data frame, whose first column must be the factor variable and whose second column must be the response variable.
Logical: if TRUE, within-sample variances are assumed to be equal
"QQ" or "hist"
if TRUE, center and scale the means to match the scale of the errors
on the histogram, lift the points representing the means above the horizontal axis by this amount.
W. John Braun and Sarah MacQueen