pandas 三维熊猫数据帧错误“必须通过二维输入”
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时间：2020-09-14 05:40:11 来源:igfitidea点击:
Three Dimensional Pandas DataFrame Error "Must Pass 2-D Input"
提问by kel
I am trying to put a 3-D array into a pandas dataframe:
我正在尝试将 3-D 数组放入 Pandas 数据框中：
import pandas as pd
import numpy as np
A = np.arange(1, 9).reshape(2, 2, 2)
lable_one = np.array(['one', 'two'])
lable_two = np.array(['a', 'b'])
df = pd.DataFrame(
A,columns=pd.MultiIndex.from_tuples((lable_one,lable_two)))
columns=pd.MultiIndex.from_tuples((lable_one, lable_two)))
Error:
错误：
ValueError: Must pass 2-d input
My desired output is:
我想要的输出是：
one two
a b a b
0 1 5 2 7
1 3 6 4 8
回答by piRSquared
- Use
from_productfor your columns - Reshape your array after a transpose
- 使用
from_product您的列 - 转置后重塑您的阵列
lable_one = np.array(['one', 'two'])
lable_two = np.array(['a', 'b'])
cols = pd.MultiIndex.from_product([lable_one, lable_two])
pd.DataFrame(A.T.reshape(2, -1), columns=cols)
one two
a b a b
0 1 5 3 7
1 2 6 4 8
