随笔分类 - python大数据
摘要：import pandas as pdsr = pd.Series([1,2,3],index=['a','b','c'])sr1 = pd.Series({'a':1,'b':4})sr.indexsr.valuesr.values'a' in srsr['a':'c']sr['a']sr1+sr
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摘要：import numpy as np a = [1,2,3] b = np.array(a) b.T (b*2).sum() np.dtype np.size np.shape np.arange(1,10,2) np.linspace(-10,10,100) np.zeroes(10) np.ze
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摘要：import numpy as nparray1 = np.array([1,2,3,4])print(array1)array2 = np.array((1,2,3,4))print(array2)array3 = np.array([[1,2,3,4], [5,6,7,8]])print(arr
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