Calculate angle between three consecutive points
three_point_angle(x)matrix with first two columns assumed to contain x, y
coordinates.
Other venndir utility:
curate_venn_labels(),
expand_range(),
make_color_contrast(),
make_venn_combn_df(),
make_venn_test(),
match_list(),
modify_venndir_overlap(),
nudge_venndir_label(),
plot,Venndir,ANY-method,
print_color_df(),
shrink_df(),
venndir_legender(),
venndir_to_df()