ergoStool                package:nlme                R Documentation

Ergometrics experiment with stool types

Description:

     The 'ergoStool' data frame has 36 rows and 3 columns.

Format:

     This data frame contains the following columns:

     effort a numeric vector giving the effort (Borg scale) required to
          arise from a stool.

     Type a factor with levels 'T1',  'T2',  'T3', and  'T4' giving the
          stool type.

     Subject an ordered factor giving a unique identifier for the
          subject in the experiment.


Details:

     Devore (2000) cites data from an article in _Ergometrics_ (1993,
     pp. 519-535) on ``The Effects of a Pneumatic Stool and a
     One-Legged Stool on Lower Limb Joint Load and Muscular Activity.''

Source:

     Pinheiro, J. C. and Bates, D. M. (2000), _Mixed-Effects Models in
     S and S-PLUS_, Springer, New York.  (Appendix A.9)

     Devore, J. L. (2000), _Probability and Statistics for Engineering
     and the Sciences (5th ed)_, Duxbury, Boston, MA.

Examples:

     fm1 <-
        lme(effort ~ Type, data = ergoStool, random = ~ 1 | Subject)
     anova( fm1 )

