On Fri, 15 Apr 2011, Miroslav Lichvar wrote:
On Thu, Apr 14, 2011 at 09:19:47PM -0700, Bill Unruh wrote:
Even the very latest code which uses the unweighted variance? I
haven't seen any problem with it yet.
Skew and hi/lo are from the sd of the slope, which I believe wasn't
affected by this problem, only variance and sd of the intercept.
Since the variance of the slope is directly related to the variance of the
values, it is also affected.
From the statistics log before the fail:
==========================================================================
Std dev'n Est offset Offset sd Diff freq Est skew Stress Ns Bs Nr
==========================================================================
1.031e-143 5.934e-07 5.155e-144 1.998e-08 2.941e-07 3.4e-01 6 2 3
2.644e-145 -1.665e-07 1.182e-145 5.702e-09 5.585e-08 3.8e-02 5 0 4
4.370e-147 1.660e-08 1.784e-147 9.544e-10 1.851e-08 9.5e-03 6 0 5
1.127e-148 -3.025e-07 4.259e-149 -7.828e-09 1.919e-08 4.3e-01 7 0 5
1.012e-150 -1.086e-07 5.061e-151 -8.074e-09 5.962e-08 3.2e-01 8 4 3
7.136e-153 2.590e-08 3.191e-153 -3.025e-09 1.282e-08 4.4e-02 5 0 4
7.090e-155 9.980e-08 2.894e-155 2.693e-09 9.664e-09 2.2e-01 6 0 5
4.220e-157 -2.490e-08 1.595e-157 -6.246e-10 3.986e-09 1.0e-01 7 0 5
1.725e-158 6.033e-07 8.624e-159 2.340e-08 2.093e-07 5.9e+00 8 4 3
4.370e-160 -6.380e-08 1.954e-160 1.379e-08 4.149e-08 4.6e-02 5 0 4
-nan -nan -nan -nan -nan nan 6 0 10
Hunn! Ok Will have to look again at the code.
--
William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273
Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324
UBC, Vancouver,BC | Program in Cosmology | un...@physics.ubc.ca
Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/
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