[Scipy-tickets] [SciPy] #1486: 'sokalmichener' and 'rogerstanimoto' distances are the same

SciPy Trac scipy-tickets@scipy....
Thu Jul 28 13:47:21 CDT 2011

#1486: 'sokalmichener' and 'rogerstanimoto' distances are the same
 Reporter:  muellner       |       Owner:  peridot    
     Type:  defect         |      Status:  new        
 Priority:  normal         |   Milestone:  Unscheduled
Component:  scipy.spatial  |     Version:  0.9.0      
 Keywords:                 |  
 In scipy.spatial.distance, the 'sokalmichener' and 'rogerstanimoto'
 distances seem the same, both for floating point and boolean inputs. Yet,
 they are computed slightly differently, and the documentation is slightly
 different (although equivalent). Why this very confusing duplication?

 I suggest to combine both dissimilarity measures, both in the source code
 and the documentation, and indicate that one is an alias for the other.

Ticket URL: <http://projects.scipy.org/scipy/ticket/1486>
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