1. A tangible computer readable storage medium storing one or more sequences of instructions for analyzing a digital image, which when executed by one or more processors, cause: arranging values of one or more data sets into a table, wherein each cell of the table comprises a set of values from the one or more data sets; after mapping each cell of the table to a particular color, generating a digital image based on the mapping of values in each of the cells of the table to color, wherein the digital image identifies the minimum value and the maximum value of the one or more data sets; and performing an analytical operation on the digital image by deriving values represented by the colors associated with the pixels of the digital image using the minimum value and the maximum value.