normWithin norms the data within specified groups in a data frame
normWithin(data = NULL, idvar, measurevar, betweenvars = NULL, na.rm = TRUE)
| data | a dataframe | 
|---|---|
| idvar | the name of the column that identifies each subject | 
| measurevar | the name of a column that contains the variable to be summariezed | 
| betweenvars | a vector containing names of columns that are between-subjects variables | 
| na.rm | boolean that indicates whether to ignore NA's | 
a data.frame
if (FALSE) { normWithin(data = sleep, idvar = "ID", measurevar = "extra", betweenvars = "group") }