[Numpy-discussion] [Fwd: [Matplotlib-users] warning: Numeric and amd64]

John Hunter jdhunter at ace.bsd.uchicago.edu
Fri Oct 1 10:33:02 CDT 2004


>>>>> "Todd" == Todd Miller <jmiller at stsci.edu> writes:

    >>>> from RandomArray import *

    >>>> normal(2,2,10)
    Todd>  array([ 2., 2., 2., 2., 2., 2., 2., 2., 2., 2.])

I get this too on a 64bit Opteron 250.

The root of the problem appears to be

  >>> from RandomArray import standard_normal
  >>> standard_normal(10)
  array([  5.31046164e-315,   1.57997427e-314,   5.16421382e-315,   5.22924144e-315,
              1.59247813e-314,   1.58920141e-314,   5.23691141e-315,
              5.24305935e-315,   5.20686204e-315,   1.58739568e-314])


But MLab.randn, which uses a different approach, works fine.

I've have this gnawing feeling I've seen this before, but I can't
remember ....

JDH




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