rootstock {ACSWR} | R Documentation |
The goal is to test if the mean vector of the four variables is same across 6 stratas of the experiment.
data(rootstock)
A data frame with 48 observations on the following 5 variables.
rootstock
Six different rootstocks
y1
trunk girth at 4 years
y2
extension growth at 4 years
y3
trunk girth at 15 years
y4
weight of tree above ground at 15 years
Rencher, A.C. (2002). Methods of Multivariate Analysis, 2e. J. Wiley.
data(rootstock)
attach(rootstock)
rs <- rootstock[,1]
rs <- factor(rs,ordered=is.ordered(rs)) # Too important a step
root.manova <- manova(cbind(y1,y2,y3,y4)~rs)
summary(root.manova, test = "Wilks")