Repeated Measures ANCOVA in R | A Complete Guide
The repeated measures ANCOVA in R tests whether the average values of one or more variables measured repeatedly on the same subjects differ significantly after adjusting for a covariate. The code for performing a one-way repeated measures ANOVA in R is: # Fit the repeated measures ANOVA model
model <- aov(response ~ factor(time) + Error(factor(subject)), data = data)
# View the model summary
summary(model) The code for performing a two-way repeated measures ANOVA in R is: # Fit the repeated measures ANOVA model
model <- aov(response ~ factor(time) * factor(group) + Error(factor(subject)), data = data)
# View the model summary
summary(model) The code for performing a three-way repeated measures ANOVA in R is: # Fit the repeated measures ANOVA model
model <- aov(response ~ factor(time) * factor(group) * factor(condition) + Error(factor(subject)), data = data)
# View the model summary
summary(model) Key takeaways Repeated measures ANCOVA is a statistical method for comparing the means o…
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