python-numpy|python-numpy 笔记

  • 参考网址doc:https://docs.scipy.org/doc/numpy/user/quickstart.html
  • Unlike in many matrix languages, the product operator * operates elementwise in NumPy arrays. The matrix product can be performed using the dot function or method:
>>> A = np.array( [[1,1], ...[0,1]] ) >>> B = np.array( [[2,0], ...[3,4]] ) >>> A*B# elementwise product array([[2, 0], [0, 4]]) >>> A.dot(B)# matrix product array([[5, 4], [3, 4]])

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