The Chi2 method

On the main chi2 visualization screen, the chi2 graph is displayed along the whole DNA sequence. Chi2 values over a given threshold are reported. The contingency tables for the current chi2 point are displayed and can be detailed on a further visualization level. The computation of the numbers of each nucleotid, expected and observed in each codon position, as well as the partial chi2 and the chi2 values is explained.

Computation of the contingency tables