Figure 2.

Selected Venn diagram special cases and Euler diagrams drawn by the VennDiagram package. Row 1, column 1: automatically drawn, customizable lines that optimize display of partial areas when individual partial areas become too small in two-set Venn diagrams. Row 1, column 2: a two-set Euler diagram showing total inclusion of one of the sets. Row 1, column 3: a two-set Euler diagram showing two distinct sets. Row 2, column 1: a three-set Euler diagram where one set has no discrete elements. Row 2, column 2: a three-set Euler diagram where one set has no discrete elements is totally included in one of the other two sets. Row 2, column 3: a three-set Euler diagram where two sets have no discrete elements and are included in a larger third set. Row 3, column 1: a three-set Euler diagram showing total inclusion of two sets that are distinct from the third set. Row 3, column 2: a three-set Euler diagram where one set is totally included in another set, which is itself totally included in the third set. Row 3, column 2: a three-set Euler diagram showing three distinct sets. The code to generate all diagrams shown here is included in Additional File 3.

Chen and Boutros BMC Bioinformatics 2011 12:35   doi:10.1186/1471-2105-12-35
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