quick and easy function  to show proportions of values of a variable,
defaults to including missings
     
    
    Usage
    props(..., exclude = NULL)
 
     
    
    Arguments
- ...
 
passed to crosstabs
 
- exclude
 
defaults to NULL (i.e. includes NA)
 
 
    
    Examples
    x = NA
props(~ x)
#> x
#> <NA> 
#>    1