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Archiver > GENEALOGY-DNA > 2010-03 > 1268847905


From: (John Chandler)
Subject: Re: [DNA] OT How many races are there?
Date: Wed, 17 Mar 2010 13:45:05 -0400
References: <9e2b1.3875d76e.38d2394b@aol.com><BLU126-DS15F1457F7750EB09BF7863922C0@phx.gbl><420D34E2-29D8-434D-874C-09388BE92820@vizachero.com>
In-Reply-To: <420D34E2-29D8-434D-874C-09388BE92820@vizachero.com> (messagefrom Vincent Vizachero on Wed, 17 Mar 2010 13:07:35 -0400)


Vince wrote:
> DNAPrint could just as
> easily run their analysis with k=2 or k=4. They picked three because,
> well, triangles are elegant.

In fact, they picked four, not three. Their diagrams showed three at
a time on a triangle, and they eventually put togather a diagram with
four triangles to show contours for all four. However, it should be
noted that they started out trying to work with k=5 and failed to get
a consistent determination. It's possible that their test cases
included some especially tough calls on the boundary between Asia
and Polynesia/Oceania and that they could have proceeded with their
5-component scheme to the same sort of brief commercial success
that the 4-component scheme enjoyed, but there would have been all
the more fudging in the interpretation of minor admixtures.

John Chandler


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