过滤表中定向的共现

import pandas as pd

# 创建数据框
data = {
    '用户ID': ['A', 'A', 'B', 'C', 'D'],
    '关注用户ID': ['B', 'C', 'D', 'A', 'B']
}
df = pd.DataFrame(data)

# 过滤定向共现
user_of_interest = 'A'
directed_cooccurrence = df[df['用户ID'] == user_of_interest]

print(directed_cooccurrence)

  用户ID 关注用户ID
0      A         B
1      A         C

directed_cooccurrence_counts = directed_cooccurrence['关注用户ID'].value_counts()
print(directed_cooccurrence_counts)

B    1
C    1
Name: 关注用户ID, dtype: int64

import matplotlib.pyplot as plt

directed_cooccurrence_counts.plot(kind='bar')
plt.xlabel('关注用户ID')
plt.ylabel('共现次数')
plt.title('用户A的定向共现次数')
plt.show()