numpy 数组增加列，增加行的函数：column_stack,row_stack

 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)

结果：

note：

column_stack,row_stack函数参数是一个元组

np.delete()：删除行或列

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