SASmixed (version 0.1-7)

Weights: Data from a weight-lifting program

Description

The Weights data frame has 399 rows and 5 columns.

source

Littel, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. (1996), SAS System for Mixed Models, SAS Institute (Data Set 3.2(a)).

Examples

options(
  contrasts = c(unordered = "contr.SAS", ordered = "contr.poly"))
data(Weights)
fm1Weight <- lme( strength ~ Program * Time,
                  data = Weights, random = ~ 1 | Subj)
summary( fm1Weight )               # compare with output 3.1, p. 91
VarCorr( fm1Weight )
anova( fm1Weight )
fm2Weight <- update( fm1Weight, random = ~ Time | Subj )
anova( fm1Weight, fm2Weight )
summary( fm2Weight )
VarCorr( fm2Weight )
intervals( fm2Weight )
fm3Weight <- update( fm2Weight, correlation = corAR1())
anova( fm2Weight, fm3Weight )
fm4Weight <- update( fm3Weight, strength ~ Program * (Time + I(Time^2)),
                    random = ~Time|Subj)
summary( fm4Weight )
VarCorr( fm4Weight )
anova( fm4Weight )
intervals( fm4Weight )