[NumPy-Tickets] [NumPy] #1624: dot gives wrong result for large array with float32 objects

NumPy Trac numpy-tickets@scipy....
Fri Oct 1 07:15:31 CDT 2010


#1624: dot gives wrong result for large array with float32 objects
-------------------------+--------------------------------------------------
  Reporter:  c_huettel   |       Owner:  somebody
      Type:  defect      |      Status:  closed  
  Priority:  high        |   Milestone:  2.0.0   
 Component:  numpy.core  |     Version:  1.3.0   
Resolution:  invalid     |    Keywords:          
-------------------------+--------------------------------------------------
Changes (by pv):

  * status:  new => closed
  * resolution:  => invalid


Comment:

 It's loss of precision, and it is different since dot() is not implemented
 as a naive summation.

 It's not a bug, effects like this are a fundamental property of floating
 point numbers.

-- 
Ticket URL: <http://projects.scipy.org/numpy/ticket/1624#comment:2>
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