pandas层次化索引
2017-10-15 16:06
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data = pd.Series(np.random.randn(10),index=[
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data.index)
data = pd.Series(np.random.randn(10),index=[
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data[‘b’])
data = pd.Series(np.random.randn(10),index=[
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data[‘b’])
print(data[:,2])
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data.index)
data = pd.Series(np.random.randn(10),index=[
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data[‘b’])
data = pd.Series(np.random.randn(10),index=[
[‘a’,’a’,’a’,’b’,’b’,’b’,’c’,’c’,’d’,’d’],
[1,2,3,1,2,3,1,2,2,3]
])
print(data)
print(data[‘b’])
print(data[:,2])
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