Python：维恩图：如何显示图表内容？

Question

我有下面的工作代码。

from matplotlib import pyplot as plt
import numpy as np
from matplotlib_venn import venn3, venn3_circles
Gastric_tumor_promoters = set(['DPEP1', 'CDC42BPA', 'GNG4', 'RAPGEFL1', 'MYH7B', 'SLC13A3', 'PHACTR3', 'SMPX', 'NELL2', 'PNMAL1', 'KRT23', 'PCP4', 'LOX', 'CDC42BPA'])

Ovarian_tumor_promoters = set(['ABLIM1','CDC42BPA','VSNL1','LOX','PCP4','SLC13A3'])

Gastric_tumor_suppressors = set(['PLCB4', 'VSNL1', 'TOX3', 'VAV3'])
#Ovarian_tumor_suppressors = set(['VAV3', 'FREM2', 'MYH7B', 'RAPGEFL1', 'SMPX', 'TOX3'])
venn3([Gastric_tumor_promoters,Ovarian_tumor_promoters, Gastric_tumor_suppressors], ('GCPromoters', 'OCPromoters', 'GCSuppressors'))

venn3([Gastric_tumor_promoters,Ovarian_tumor_promoters, Gastric_tumor_suppressors], ('GCPromoters', 'OCPromoters', 'GCSuppressors'))
plt.show()

如何在这 3 个圆圈中显示每个集合的内容？颜色 alpha 为 0.6。圆圈必须更大以容纳所有符号。

Answer 1

我不确定是否有一种简单的方法可以为任何可能的集合组合自动执行此操作。如果您准备在特定示例中进行一些手动调整，请从以下内容开始：

A = set(['DPEP1', 'CDC42BPA', 'GNG4', 'RAPGEFL1', 'MYH7B', 'SLC13A3', 'PHACTR3', 'SMPX', 'NELL2', 'PNMAL1', 'KRT23', 'PCP4', 'LOX', 'CDC42BPA'])
B = set(['ABLIM1','CDC42BPA','VSNL1','LOX','PCP4','SLC13A3'])
C = set(['PLCB4', 'VSNL1', 'TOX3', 'VAV3'])

v = venn3([A,B,C], ('GCPromoters', 'OCPromoters', 'GCSuppressors'))

v.get_label_by_id('100').set_text('\n'.join(A-B-C))
v.get_label_by_id('110').set_text('\n'.join(A&B-C))
v.get_label_by_id('011').set_text('\n'.join(B&C-A))
v.get_label_by_id('001').set_text('\n'.join(C-A-B))
v.get_label_by_id('010').set_text('')
plt.annotate(',\n'.join(B-A-C), xy=v.get_label_by_id('010').get_position() +
             np.array([0, 0.2]), xytext=(-20,40), ha='center',
             textcoords='offset points', 
             bbox=dict(boxstyle='round,pad=0.5', fc='gray', alpha=0.1),
             arrowprops=dict(arrowstyle='->',              
                             connectionstyle='arc',color='gray'))

请注意，像v.get_label_by_id('001')返回 matplotlibText对象这样的方法，您可以根据自己的喜好自由配置它们（例如，您可以通过调用set_fontsize(8)等来更改字体大小）。