functions in txpath.i - r

             plt, rotext(text,path), x, y  
 
     return TEXT string as is (PATH=0), reversed (PATH=1), reversed and  
     with a '\n' between each character, or with '\n' between characters  
     (PATH=3).  When plotted, these strings correspond to the original  
     meaning of the text path= keyword.  That is, successive characters  
     will appear to the right, left, up, or down according to whether  
     PATH is 0, 1, 2, or 3  
interpreted function, defined at i/txpath.i   line 12