tree length, ci, ri

[Mark Siddall]

In article <D8CqKD.2rn at zoo.toronto.edu> I wrote::
>So, the RI is the ratio of the number of extra-steps acheived to the 
>maximum number of extra steps possible.  It is sensitive both to the

ERRATUM: 
The RI is the ratio of:
(max possible extra steps - extra steps acheived):(max poss extra steps)

-- 
Mark E. Siddall                "I don't mind a parasite...
mes at vims.edu                    I object to a cut-rate one" 
Virginia Inst. Marine Sci.                     - Rick
Gloucester Point, VA, 23062