This function is similar to R function dim.
     
    
    
    Arguments
- x
 
a string character, the name of a dataframe or matrix
 
 
    
    Value
    the dimension of the input object
     
    
    Details
    The function returns the dimension of the input dataframe or matrix
     
    
    Author
    Demetris Avraam, for DataSHIELD Development Team