1. A method of generating histograms to represent probabilistic data, comprising: receiving probabilistic data; generating a plurality of histograms, wherein each histogram is generated based on items represented by the probabilistic data, and wherein each histogram is generated using a different quantity of buckets, each of the buckets containing different ones of the items; determining an error measure associated with each of the plurality of histograms; selecting one of the plurality of histograms based on its associated error measure; and displaying parameter information associated with the one of the plurality of histograms to represent the probabilistic data.