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Author rhettinger
Recipients mark.dickinson, rhettinger, serhiy.storchaka, tim.peters
Date 2015-04-25.23:11:03
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Message-id <1430003464.08.0.153638572698.issue24059@psf.upfronthosting.co.za>
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Content 
The next question is whether we care about that 1 ULP in the context of the random number calculations which already involve multi-step chains that aren't favorable to retaining precision: 

   s + (1.0 + s * s) ** 0.5

   ainv = (2.0 * alpha - 1.0) ** 0.5
   bbb = alpha - LOG4
   ccc = alpha + ainv

   g2rad = (-2.0 * _log(1.0 - random())) ** 0.5
   z = _cos(x2pi) * g2rad
   self.gauss_next = _sin(x2pi) * g2rad

   stddev = (sqsum/n - avg*avg) ** 0.5
History
Date User Action Args
2015-04-25 23:11:04rhettingersetrecipients: + rhettinger, tim.peters, mark.dickinson, serhiy.storchaka
2015-04-25 23:11:04rhettingersetmessageid: <1430003464.08.0.153638572698.issue24059@psf.upfronthosting.co.za>
2015-04-25 23:11:04rhettingerlinkissue24059 messages
2015-04-25 23:11:03rhettingercreate