如何计算某一特定行在所有列中出现的频率

import pandas as pd

# 读取数据表格，假设数据存储在名为data.csv的文件中
data = pd.read_csv('data.csv')

# 假设要计算第3行在所有列中出现的频率
row_index = 2

# 统计第3行在每一列中出现的次数
frequencies = {}
for column in data.columns:
    count = data[column].value_counts().get(data.iloc[row_index, column], 0)
    frequencies[column] = count

# 计算频率
total_rows = len(data)
for column, count in frequencies.items():
    frequency = count / total_rows
    print("第{}行在{}列中的频率为：{:.2%}".format(row_index+1, column, frequency))