[BiO BB] Phylip distance matrix symmetry error

[Mike Marchywka]

As they told me in junior high programming, NEVER make a floating point
equality compare ( zero may be ok, but that is questionable) :):


(epsilon^2<tolerance )is ok

foo==bar is really questionable...




>From: "Samantha Fox" <bioinfosm at gmail.com>
>Reply-To: "General Forum at Bioinformatics.Org" 
><bio_bulletin_board at bioinformatics.org>
>To: "General Forum at Bioinformatics.Org" 
><bio_bulletin_board at bioinformatics.org>
>Subject: [BiO BB] Phylip distance matrix symmetry error
>Date: Wed, 13 Jun 2007 16:48:27 -0400
>
>ERROR: distance matrix is not symmetric:
>       (42,1) element and (1,42) element are unequal.
>       They are   1.544868 and   1.544868, respectively.
>       Is it a distance matrix?
>
>That looks symmetric to me !!
>Any clues anyone ??
>
>~S
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