Figure 2

Performing dataset merges with Booly. (a) The right textbox depicts a list of datasets ready for Boolean operations. Numbered cartoon demonstrates the order of operations performed for this query. This query identifies genes lost in D. ananassae but are retained in the melanogaster subgroup and in the outgroup D. pseudobscura (see Additional file 2 [Figure S4a, Figure S4b]). Booly Precedence: 1) Group Selection Using Parenthesis. 2) NOT/Conjunction (-) Operation. 3) AND/Intersection (+) Operation. 4) OR/Union (U) Operation. Precedence for multiple instances of the same operator is determined by the order in which they appear in the query. (b) Approximate running time performing a Booly intersection with alias resolution. Y-axis contains the total number of combined identifiers (e.g. genes) for every dataset in a Booly merge. Plot shown represents 200,000 genes (10 intersections of datasets containing 20,000 genes apiece).