Merge pull request #31 from thundergolfer/CYKdev

Fixing loop range bug in pseudocode

Author: norvig

md/CYK-Parse.md

@@ -12,7 +12,7 @@ __function__ CYK-Parse(_words_, _grammar_) __returns__ _P_, a table of probabili
  /\* Combine first and second parts of right-hand sides of rules, from short to long \*/  
  __for__ _length_ = 2 __to__ _N_ __do__  
   __for__ _start_ = 1 __to__ _N_ - _length_ + 1 __do__  
-   __for__ _len1_ = 1 __to__ _N_ - 1 __do__  
+   __for__ _len1_ = 1 __to__ _length_ - 1 __do__  
     _len2_ ← _length_ - _len1_  
     __for each__ rule of the form (_X_ → _Y_ _Z_ [_p_]) __do__  
      _P_[_X_, _start_, _length_] ← Max(_P_[_X_, _start_, _length_], _P_[_Y_, _start_, _len1_] x _P_[_Z_, _start_ + _len1_, _len2_] x _p_)