[Scipy-tickets] [SciPy] #1852: Bug in spearmanr function to calculate correlation

SciPy Trac scipy-tickets@scipy....
Tue Feb 26 00:49:52 CST 2013


#1852: Bug in spearmanr function to calculate correlation
--------------------+-------------------------------------------------------
 Reporter:  damani  |       Owner:  somebody   
     Type:  defect  |      Status:  new        
 Priority:  normal  |   Milestone:  Unscheduled
Component:  Other   |     Version:  0.11.0     
 Keywords:          |  
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 Encountering a problem with scipy v.11 library in python2.7 which gives
 spearmanrcorrel([1,2,3,4,5],[5,6,7,8,7]) = 0.8207 while scipy v.6 in
 python2.5 gives spearmanr([1,2,3,4,5],[5,6,7,8,7]) = 0.825(which is
 correct according to spearman correlation formula).

 The spearman correlation for [1,2,3,4,5],[5,6,7,8,7] calculated online
 according to formula available at :
 https://statistics.laerd.com/calculators/spearmans-rank-order-correlation-
 calculator-1.php
 , also gives 0.825.

 --The definition of spearmanr function in Scipy v.11 is given at :
 http://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.spearmanr.html#scipy.stats.spearmanr.

 Maybe related to Ticket #1411.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1852>
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