[Pspp-commits] [SCM] GNU PSPP branch, master, updated. v0.7.9-463-g97f2fd8

[John Darrington]

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- Log -----------------------------------------------------------------
commit 97f2fd8ca9f4a977ed055e145eb722a52e0e6cc7
Author: John Darrington <address@hidden>
Date:   Mon Dec 31 11:33:38 2012 +0100

    Remove assertions which compare the sum of weights between passes.
    
    These asserted that the sum of case-weights of a dataset calculated
    in one pass, was the same as that calculated in a second pass.
    Algebraically this is correct.  However, for optimisation purposes,
    it is sometimes desireable that the second pass occurs after the
    data has been reordered.   If that happens, the sum of weights can
    be slightly different due to floating point rounding errors.  This
    happens particularly when the caseweights are fractional.

-----------------------------------------------------------------------

Summary of changes:
 src/math/moments.c      |    6 +-----
 src/math/percentiles.c  |    2 --
 src/math/trimmed-mean.c |    2 --
 3 files changed, 1 insertions(+), 9 deletions(-)


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