Functions for adding columns and rows to numpy arrays: column_stack, row_stack, functions for deleting rows or columns, delete

 def fun_ndarray():
      a = [[1,2,7],
           [-6,-2,-3],
           [-4,-8,-55]
           ]
      b = [3,5,6]
      a = np.array(a)
      b = np.array(b)
      a_b_column = np.column_stack((a,b))#左右根据列拼接
      a_b_row = np.row_stack((a,b))#上下按照行拼接 
      print('a_b_column')
      print(a_b_column)
      print('a_b_row')
      print(a_b_row)

result:

note：

column_stack, row_stack function parameter is a tuple

np.delete(): delete a row or column

data = np.delete(data,3,axis=1) # 删除第四列

 

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