list_data.RdCreate a sandbox containing small subsets of target datasets.
list_data(data_id)
| data_id | Element or vector of class character.  | 
    
|---|
A data.frame.
When no argument is used, the function will return a data.frame with a summary of the existing datasets and their general characteristics. When data.id is provided, the function will search for the corresponding dataset and return a data.frame reporting on the individual files that compose each of the target datasets.