NumPy学习笔记

Example

np.__version__
np.array([[1,2,3],[4,5,6]])
np.zeros((3,3))
np.ones((2,3,4))
np.eye(3)
np.range(5)      #[0,1,2,3,4]
np.random.rand(2,3) 
np.random.randint(5,size=(2,3))  #value no more than 5
np.max(a,axis=0)  #return every column max