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draw 2d, 3d, and 4d Venn diagram
draw_2d_venn(x, n.sides, category.names, label, ...)draw_3d_venn(x, n.sides, category.names, label, ...)draw_4d_venn(x, n.sides, category.names, label, ...)
draw_3d_venn(x, n.sides, category.names, label, ...)
draw_4d_venn(x, n.sides, category.names, label, ...)
a list of items
resolution
default is names(x)
c("both","percent","count")
passing to geom_polygon, enabling modification of polygon styles