BodyWeight: Rat weight over time for different diets
Description
The BodyWeight data frame has 176 rows and 4 columns.
Arguments
source
Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S
and S-PLUS, Springer, New York. (Appendix A.3)
Crowder, M. and Hand, D. (1990), Analysis of Repeated
Measures, Chapman and Hall, London.
Hand, D. and Crowder, M. (1996), Practical Longitudinal Data
Analysis, Chapman and Hall, London.
Details
Hand and Crowder (1996) describe data on the body weights of rats
measured over 64 days. These data also appear in Table 2.4 of
Crowder and Hand (1990). The body weights of the rats (in grams)
are measured on day 1 and every seven days thereafter until day 64,
with an extra measurement on day 44. The experiment started several
weeks before ``day 1.'' There are three groups of rats, each on a
different diet.