将系列的值添加到数据帧

Question

我正在尝试将一系列的值添加到数据帧中.我不是要将列添加到数据帧的末尾,即在数据框中创建一个额外的列.

我有一个与数据框中的列长度相同的系列.我想将系列中的值添加到框架中的每一列.我试过Dataframe.add()但它没有用.

代码:Dataframe(命名阅读器):

     Current track blade 1   Current track blade 2   
0                -8.577881               -0.333252  
1                -6.284912                5.294434    
2                 6.269775               11.229490     
3                 5.253418               10.187260     
4               -16.088380               -2.967773  

要添加到每列的系列(名为abs_track):

    Current abs track
0            3503.125
1            3517.333
2            3504.778
3            3476.127
4            3477.776

reader=reader+abs_track并reader.add('abs_track')给:

     Current abs track   Current track blade 1   Current track blade 2    


0                  NaN                     NaN                     NaN                     
1                  NaN                     NaN                     NaN 
2                  NaN                     NaN                     NaN   
3                  NaN                     NaN                     NaN   
4                  NaN                     NaN                     NaN   

有任何想法吗.

Answer 1

您需要传递参数axis=0以实现您想要的:

df = pd.DataFrame({"Current track blade 1":[-8.577881, -6.284912, 6.269775, 5.253418, -16.088380], "Current track blade 2": [-0.333252, 5.294434, 11.229490,10.187260,-2.967773]})
s = pd.Series([3503.125, 3517.333, 3504.778, 3476.127, 3477.776])

df.add(s, axis=0)

Out[58]:
   Current track blade 1  Current track blade 2
0            3494.547119            3502.791748
1            3511.048088            3522.627434
2            3511.047775            3516.007490
3            3481.380418            3486.314260
4            3461.687620            3474.808227

这将按列添加而不是按行添加,这是默认值.