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courses:rg:2011-report-parser [2012/09/27 10:36]
ufal
courses:rg:2011-report-parser [2012/09/27 10:54]
ufal
Line 37: Line 37:
 ==== Parser ==== ==== Parser ====
  
-  * we illustrated a step of the parser+  * we illustrated a step of the parser
 +{{:courses:rg:ndef_parsing.png|}} 
 +  * we compared time complexity of this system with other commonly used ones 
 + 
 +| MST parser | <latex>\mathop O(n^2)</latex> | | 
 +| MALT parser | <latex>\mathop O(n)</latex> | in fact slower | 
 +| this parser | <latex>\mathop O(n\log(n))</latex> | <latex>\mathop O(n^2)</latex> - naive implementation | 
 +| this parser - non-projective | <latex>\mathop O(n^2\log(n))</latex> | <latex>\mathop O(n^3)</latex> - naive implementation | 
 +    
 +   * implemented by a heap, it can reach <latex>\mathop O(n\log(n))</latex>; however, they don't use it because it's fast enough

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