Aggregate function: returns the average of the values in a group.
     
    
    Usage
    avg(x, ...)
# S4 method for class 'Column'
avg(x)
 
     
    
    Arguments
- x
 
Column to compute on or a GroupedData object.
 
- ...
 
additional argument(s) when x is a GroupedData object.
 
 
    
    
    
    Examples
    if (FALSE) avg(df$c) # \dontrun{}