NumPy中ndarray类型属性、创建和变换

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Point:

ndarray的属性：
 .ndim
 .shape
 .size
 .dtype
 .itemsize

                        

                       

ndarray的创建：
    前提import numpy as np    
    np.array()
    np.arrange()
    np.ones(shape)
    np.zeros()
    np.full(shape,val)
    np.ones_like(a)
    np.zeros_like(a)
    np.full_like(a,val)

ndarray的变换：
    .reshape()
    .resize()
    .flatten()

    .astype()

See you next time , ciao !