Talk:Nucleotide diversity

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The definition is very unclear. It refers to two DNA sequences, then proceeds to use I and j to index some large number of sequences. There is confusion about sequences vs nucleotide sites, and about the definition of the x values.Tedtoal (talk) 07:13, 6 January 2011 (UTC)[reply]

The formula could be given in the following way to make clear that only non-redundant pairwise comparisons are calculated:

\pi =\sum _{i<j}x_{i}x_{j}\pi _{ij}=\sum _{i=1}^{n}\sum _{j=i+1}^{n}x_{i}x_{j}\pi _{ij}

I agree with Tedtoal that parameters should be clearly defined. It might be good idea to define

\pi

as pairwise differences between all alleles over all pairwise comparisons over length of region:

{\frac {\Pi /(n(n-1)/2)}{L}}

12:31, 11 January 2011 (UTC) —Preceding unsigned comment added by 194.94.96.194 (talk)