Save roughsf plot to file
     
    
    Usage
    save_roughsf(rsf, file, background = "white", wait = 4)
 
    
    Arguments
- rsf
- result from calling the function - roughsf
 
- file
- filename 
- background
- string giving the html background color 
- wait
- time in seconds to wait for page load 
 
    
    Value
    No return value, called for side effect