DataFrame 的索引
可以用 .reset_index()把DataFrame的索引重置为[0,1,2…]。...多级索引
多级索引有点类似后面要讲的group
首先定义元素为元组的列表
idx1 = ['odd','even','odd','even','odd','even']
idx2 = ['a','b',...1.061639 -0.778537
even c 0.588844 -1.052212 -0.927885 0.867231
获取数据
df.loc['odd','a']
df.loc['odd...'] = ['odd','even','odd','even']
>>
No1 No2 No3 odd_even
2001-01-31 1.141374...-1.881851 -0.032356 odd
2001-04-30 1.016377 -0.742390 1.107901 even
group = df.groupby('odd_even