numpy 数组增加列，增加行的函数：column_stack,row_stack，删除行或列的函数，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)

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