Venn diagram

                new CanvasXpress("canvas1", {
                  "venn": {
                    "data": {
                      "A": 340,
                      "B": 562,
                      "C": 620,
                      "D": 592,
                      "AB": 639,
                      "AC": 456,
                      "AD": 257,
                      "BC": 915,
                      "BD": 354,
                      "CD": 143,
                      "ABC": 552,
                      "ABD": 578,
                      "ACD": 298,
                      "BCD": 613,
                      "ABCD": 148
                    },
                    "legend": {
                      "A": "List 1",
                      "B": "List 2",
                      "C": "List 3",
                      "D": "List 4"
                    }
                  }
                }, {
                  "graphType": "Venn",
                  "background": "rgb(245,245,245)",
                  "vennGroups": 4
                })
              

                new CanvasXpress("canvas2", {
                  "venn": {
                    "data": {
                      "A": 340,
                      "B": 562,
                      "C": 620,
                      "AB": 639,
                      "AC": 456,
                      "BC": 915,
                      "ABC": 552
                    },
                    "legend": {
                      "A": "List 1",
                      "B": "List 2",
                      "C": "List 3"
                    }
                  }
                }, {
                  "graphType": "Venn",
                  "background": "rgb(245,245,245)",
                  "vennGroups": 3
                })