python - 如何显示维恩图的图表内容

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()

如何显示这 3 个圆圈中每组的内容？颜色 alpha 为 0.6。圆圈必须更大才能容纳所有符号。

Answer 1

我不确定是否有一种简单的方法可以针对任何可能的集合组合自动执行此操作。如果您准备好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') 这样的方法会返回 matplotlib Text 对象，您可以根据自己的喜好自由配置它们(例如，您可以更改字体大小(通过调用set_fontsize(8)等)。