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From: Perry Swanborough <Perry.Swanborough@jcu.edu.au>
Subject: Erratum
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 I <Perry.Swanborough@jcu.edu.au> wrote:
>For a genotype string of N loci and epistasis operating where the net 
>fitness of each gene is a function of its own fitness contribution and 
>fitness contributions from K other genes in the string, let each >possible 
>epistatic combination correspond to a unique single value V. V can be 
>calculated as :
>
>V = C(1)*G(1) + C(2)*G(2) + C(3)*G(3) + ... + C(K+1)*G(K+1)
>
>where G(1) to G(K+1) are the numerical locations on the string of the 
>gene and the other K genes to which it is epistatically linked, and C(1) 
>to C(K+1) are constants chosen so that all V values for every possible 
>epistatic combination are different from each other.
>
>  (snip)

I wasn't accurate when I posted this. The expression for V should be :

For gene Y of N genes comprising the string,

V = C(1)*G(1) + C(2)*G(2) + ... + C(K+1)*G(K+1) + L*(location number of 
gene Y on string)

where G(X) for X = 1 to K is the value at the locus of epistatic gene X, 
G(K+1) is the value at the locus of gene Y, and C(1) to C(K+1), and L, 
are constants which ensure a set of V values all different from each 
other.

All that this is meant to achieve is a unique value for each possible 
epistatic combination. As this is only an arbitrary way of doing this, 
others may find alternative (perhaps better) ways of achieving this.

Perry

