带有图例的Matplotlib Venn图

Question

我正在使用matplotlib-venn包来绘制python中的venn图。这个包可以很好地绘制两组或三组的Venn图。然而，当其中一个集合比其他集合大得多时，小圆圈中的计数就会变得接近或重叠。下面是一个例子。

from collections import Counter
import matplotlib.pyplot as plt
from matplotlib_venn import venn2, venn3

sets = Counter()
sets['01'] = 3000
sets['11'] = 3
sets['10']  = 5
setLabels = ['set1', 'set2']

plt.figure()
ax = plt.gca()
v = venn2(subsets = sets, set_labels = setLabels, ax = ax)
plt.title('Venn Diagram')
plt.show()

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我想要做的是将计数(在本例中是3000、3和5)移动到一个图例中，其颜色与图表中的颜色相匹配。我不知道如何用matplotlib_venn来做这件事。

Answer 1

您可以用空字符串替换venn图的标签，而是从venn的修补程序和相应的计数中创建一个图例，如下所示：

from collections import Counter
import matplotlib.pyplot as plt
from matplotlib_venn import venn2, venn3

sets = Counter()
sets['01'] = 3000
sets['11'] = 3
sets['10']  = 5
setLabels = ['set1', 'set2']

plt.figure()
ax = plt.gca()
v = venn2(subsets = sets, set_labels = setLabels, ax = ax)

h, l = [],[]
for i in sets:
    # remove label by setting them to empty string:
    v.get_label_by_id(i).set_text("")
    # append patch to handles list
    h.append(v.get_patch_by_id(i))
    # append count to labels list
    l.append(sets[i])

#create legend from handles and labels    
ax.legend(handles=h, labels=l, title="counts")

plt.title('Venn Diagram')
plt.show()

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