如何在matplotlib-venn图中打印百分比？

Question

默认情况下，matplotlib-venn的venn3打印在每个重叠中都是计数的。如何打印百分比呢？

Answer 1

我想通了。只需将每个标签除以总数：

from matplotlib_venn import venn3

subsets = (1, 1, 1, 2, 1, 2, 2)
total = sum(subsets)
venn = venn3(subsets=subsets, set_labels=('Set1', 'Set2', 'Set3'))

for id in [''.join(map(str, i)) for i in product([0, 1], [0, 1], [0, 1])]:
    if id == '000':
        continue

    count = int(venn.get_label_by_id(id).get_text())
    venn.get_label_by_id(id).set_text('{:.1%}'.format(count / total))

Answer 2

一种更简洁的方法是使用subset_label_formatter参数，如下面的答案：https://stackoverflow.com/a/53490475/4133418所述

看起来会是这样的：

venn = venn3(subsets=subsets, set_labels=('Set1', 'Set2', 'Set3'),
             subset_label_formatter=lambda x: f"{(x/total):1.0%})