diggle.linear.power     Sample size calculations for difference in
                        slopes between two groups.
edland.linear.power     Linear mixed model sample size calculations.
liu.liang.linear.power
                        Linear mixed model sample size calculations
                        from Liu & Liang (1997).
lmmpower                Sample size calculations for linear mixed
                        models of rate of change based on lmer, lme, or
                        gee "placebo" pilot estimates.
longpower-package       Sample size calculations for longitudinal data
power.longtest          Constructor function for class
                        '"power.longtest"'
power.mmrm              Linear mixed model sample size calculations.
power.mmrm.ar1          Linear mixed model sample size calculations.
print.power.longtest    Print method for longitudinal data power
                        calculation object
