1. A system comprising: a peak association matrix maker configured to associate isotope peaks within a matrix row to each other and further associate isotope peaks within a matrix column to each other; a mass/charge association mapper configured to map associated isotope peaks so that mass/charge values sharing a mapping number are associated with each other; and a correlation scorer configured to score a group of isotope clusters that are associated with each other by the peak association matrix maker and the mass/charge association mapper.