Pandas 如何将多索引数据帧的值映射到具有不同形状的其他多索引数据帧?
我有以下两个不同形状的多索引数据帧: 熊猫数据帧“a”Pandas 如何将多索引数据帧的值映射到具有不同形状的其他多索引数据帧?,pandas,replace,duplicates,multi-index,fill,Pandas,Replace,Duplicates,Multi Index,Fill,我有以下两个不同形状的多索引数据帧: 熊猫数据帧“a” col0 = ['Set 1','Set 1','Set 1','Set 1','Set 2','Set 2','Set 2','Set 2','Set 2','Set 2'] col1 = ['paa','paa','jaa','paa','jaa','jaa','jaa','paa','paa','paa'] a = pd.DataFrame(data = np.random.randint(6, size=(3, 10)), colu
col0 = ['Set 1','Set 1','Set 1','Set 1','Set 2','Set 2','Set 2','Set 2','Set 2','Set 2']
col1 = ['paa','paa','jaa','paa','jaa','jaa','jaa','paa','paa','paa']
a = pd.DataFrame(data = np.random.randint(6, size=(3, 10)), columns = [col0,col1])
输出:
Set 1 Set 2
paa paa jaa paa jaa jaa jaa paa paa paa
0 3 0 2 1 2 0 3 5 4 3
1 2 1 2 1 0 5 5 5 3 4
2 5 2 1 2 5 1 5 5 0 2
Set 1 Set 2
P1_1 P1_2 P2_1 P2_2
0 2 1 1 2
1 0 0 2 2
2 0 0 1 0
和数据帧'b'
col0 = ['Set 1','Set 1','Set 2','Set 2']
col1 = ['P1_1','P1_2','P2_1','P2_2']
b = pd.DataFrame(data = np.random.randint(3, size=(3, 4)), columns = [col0,col1])
输出:
Set 1 Set 2
paa paa jaa paa jaa jaa jaa paa paa paa
0 3 0 2 1 2 0 3 5 4 3
1 2 1 2 1 0 5 5 5 3 4
2 5 2 1 2 5 1 5 5 0 2
Set 1 Set 2
P1_1 P1_2 P2_1 P2_2
0 2 1 1 2
1 0 0 2 2
2 0 0 1 0
现在我想把两者结合起来。保留熊猫a的多重指数和熊猫b的值
熊猫“c”的期望输出:
Set 1 Set 2
P1_1 P1_2 P1_1 P1_2 P1_1 P1_2 P1_1 P1_2 P1_1 P1_2
0 2 1 2 1 1 2 1 2 1 2
1 0 0 0 0 2 2 2 2 2 2
2 0 0 0 0 1 0 1 0 1 0
熊猫‘c’的_0级与熊猫‘b’的_0级一致。“c”中的级别_1与“b”列交替出现
您可能必须以某种方式将以下各项结合起来:
temp=b.reindex(columns=map(lambda x:(x[0],'P1_1') ,a.columns))
a.groupby(level=0, axis=1)
什么都行 Idea是匹配级别
a
和b
并重复第二级列用于:
c = b.reindex(mux, axis=1)
print (c)
Set 1 Set 2
P1_1 P1_2 P1_1 P1_2 P2_1 P2_2 P2_1 P2_2 P2_1 P2_2
0 0 1 0 1 0 0 0 0 0 0
1 0 2 0 2 1 1 1 1 1 1
2 2 2 2 2 2 1 2 1 2 1