# Data about imaginary experiment with 10 patients with hypertension, blood pressure lowering drug and placebo # "1" and "10" are systolic blood pressures measured on the first and tenth day of the experiment, respectively # Probably, the better way of analysis is something like summary(aov(values ~ group * day + Error(id), data=long)) placebo1 Placebo group, systolic blood pressures on Day 1 placebo10 Placebo group, systolic blood pressures on Day 10 drug1 Drug group, systolic blood pressures on Day 1 drug10 Drug group, systolic blood pressures on Day 10