GENBOX-L ArchivesArchiver > GENBOX > 2005-01 > 1105319614
From: "wim prange" <>
Subject: RE: [GENBOX] Ancestry Chart problem-- bug??
Date: Mon, 10 Jan 2005 02:15:27 +0100
In my sample I have not entered any date so it's save to assume that Genbox
doesn't use birth- or chr-dates to 'level contemporaries'. To clarify, it
was my own assumption that GB tries to align them by compensating an
''inserted' generationlevel through skipping levels in other branches.
However, I took a closer look at the chart and noticed that there was an
inconsistency with that assumption: GB hasn't compensated any level in the
ancestorbranch for key# 7 (like it has done in the branch for key# 2). Since
both branches are equally unaffected, I would have expected to have a level
skipped in #7 too.
Maybe the reason is purely programmatic, mathematical or esthetical?
> -----Original Message-----
> From: Kathy Lenerz [mailto:]
> Sent: Monday, January 10, 2005 12:16 AM
> Subject: Re: [GENBOX] Ancestry Chart problem-- bug??
> wim prange wrote:
> > Unlike the Ahnentafel-numberingsystem (based exclusively on
> > child-parent links), the Generation-levels numbering of Genbox also
> > takes spouse-links into account: it has the assumption that spouses
> > belong to the same generation-level. When there are
> marriages between
> > generations (and producing 'shortcuts' in the chart),
> Genbox will take
> > the longest route for it's numbering and tries to 'level' other
> > generations out across the chart (over several levels). As
> I see it,
> > Genbox tries to line up contemporaries, not Ahnentafel nrs.
> I really appreciate the detailed attention you have devoted
> to this issue.
> It sure is a puzzler.
> I'm not sure how one would define or compute contemporaries,
> but as a statistician, I'd look at reducing the variability
> among the birthdates within a generation. By that standard,
> GB has not lined up contemporaries.
> Birthdates in Birthdates in Chart
> Chart Produced as it Should be
> Gen 4 Gen 5 Gen 3 Gen 4
> 1848 1814 1848 1814
> 1851 1823 1851 1823
> 1833 1806 1860 1806
> 1843 1807 1863 1807
> 1835 1825 1833
> 1837 1819 1843
> 1778 1835
> 1794 1837
> Range 18 47 15 37
> std 6.69 13.42 6.18 13.42
> (std = standard deviation)
> [Note that because part of generations 2&3 have been shoved
> back a generation in GB's chart, I've chosen the most
> comparable generations for comparison.]
> The difference between earliest and latest birthdate, as well
> as the variability among birthdates within a given generation
> is smaller in the chart as I think it should be constructed
> than in the chart GB produced.
> Whatever algorithm GB is using, the generations produced by
> the pedigree report and the ancestor chart are inconsistent.
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