Central and dispersion measures for functional data.
Arguments
- formula
- a formula, such as y ~ group, where y is a fdata object to be split into groups according to the grouping variable group (usually a factor). 
- data
- List that containing the variables in the formula. The item called "df" is a data frame with the grouping variable. The item called "y" is a fdata object. 
- drop
- logical indicating if levels that do not occur should be dropped (if f is a factor or a list). 
- func
- Measures for functional data. 
