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process_data(venn, ...)# S4 method for Venn process_data(venn, ...)
# S4 method for Venn process_data(venn, ...)
a Venn object
apply filter to internal shapes. i.e. shape_id == "601", type == "polygon"
if (FALSE) { venn <- Venn(list(A=1:3,B=2:5,C=4:8)) data <- process_data(venn) }
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