同一行的两列中的值的每种可能组合的出现频率

# 假设数据存储在一个二维列表中，每一行代表一条数据，每一列代表一个属性
data = [
    [1, 2, 3],
    [4, 5, 6],
    [1, 2, 4],
    [3, 4, 5]
]

# 创建一个字典用于记录组合的出现次数
combination_counts = {}

# 遍历每一行
for row in data:
    # 获取两列的值组合成的字符串
    combination = str(row[0]) + '-' + str(row[1])
    
    # 更新组合的出现次数
    if combination in combination_counts:
        combination_counts[combination] += 1
    else:
        combination_counts[combination] = 1

# 计算每种组合的出现频率
total_rows = len(data)
combination_frequencies = {}
for combination, count in combination_counts.items():
    frequency = count / total_rows
    combination_frequencies[combination] = frequency

# 打印每种组合的出现频率
for combination, frequency in combination_frequencies.items():
    print(combination, frequency)