[mlpack-svn] [MLPACK] #316: Bug in HMM Prediction() ?

MLPACK Trac trac at coffeetalk-1.cc.gatech.edu
Tue Jan 14 05:56:46 EST 2014


#316: Bug in HMM Prediction() ?
-------------------------+--------------------------------------------------
 Reporter:  mistycheney  |        Owner:     
     Type:  defect       |       Status:  new
 Priority:  major        |    Milestone:     
Component:  mlpack       |     Keywords:  hmm
 Blocking:               |   Blocked By:     
-------------------------+--------------------------------------------------
 Viterbi algorithm uses backtracking to find the most probable state
 sequence, but nowhere in the implementation of HMM::Prediction() can I
 find the backtracking stage. The array StateSeq is set only in the forward
 pass. This is obviously not correct because stateSeq[0] is determined
 without even seeing the later observations.

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Ticket URL: <http://trac.research.cc.gatech.edu/fastlab/ticket/316>
MLPACK <www.fast-lab.org>
MLPACK is an intuitive, fast, and scalable C++ machine learning library developed at Georgia Tech.


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