balancedGrouped | R Documentation |
Create a groupedData
object from a data matrix. This function
can be used only with balanced data. The opposite conversion, from a
groupedData
object to a matrix
, is done with asTable
.
balancedGrouped(form, data, labels=NULL, units=NULL)
form |
A formula of the form |
data |
A matrix or data frame containing the values of the
response grouped according to the levels of the grouping factor
(rows) and the distinct levels of the primary covariate (columns).
The |
labels |
an optional list of character strings giving labels for
the response and the primary covariate. The label for the primary
covariate is named |
units |
an optional list of character strings giving the units for
the response and the primary covariate. The units string for the
primary covariate is named |
A balanced groupedData
object.
JosÃ© Pinheiro and Douglas Bates bates@stat.wisc.edu
Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York.
groupedData
, isBalanced
, asTable
OrthoMat <- asTable( Orthodont )
Orth2 <- balancedGrouped(distance ~ age | Subject, data = OrthoMat,
labels = list(x = "Age",
y = "Distance from pituitary to pterygomaxillary fissure"),
units = list(x = "(yr)", y = "(mm)"))
Orth2[ 1:10, ] ## check the first few entries
# Pinheiro and Bates, p. 109
ergoStool.mat <- asTable(ergoStool)
balancedGrouped(effort~Type|Subject,
data=ergoStool.mat)
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