Question

我现在已经搜索了一段时间，而且除了硬编码之外，我无法用其他方式弄清楚如何做到这一点。在csv文件中，我必须获得三个系列的平均值的最大值，然后返回该系列的NAME，这是导致我麻烦的部分。

comp = max(DataTD['Cycle (seconds)'].mean(), DataTD['Run (seconds)'].mean(), DataTD['Swim (seconds)'].mean())
if comp == DataTD['Cycle (seconds)'].mean():
    print(DataTD['Cycle (seconds)'].name)
elif comp == DataTD['Run (seconds)'].mean():
    print(DataTD['Run (seconds)'].name)
elif comp == DataTD['Swim (seconds)'].mean():
    print(DataTD['Swim (seconds)'].name)

Answer 1

这样的事情应该有效（避免测试）：

datas = [DataTD['Cycle (seconds)'],
         DataTD['Run (seconds)'],
         DataTD['Swim (seconds)']]
means = [data.mean() for data in datas]
max_mean_idx = np.argmax(means)
print(datas[max_mean_idx].name)

Answer 2

您可以获取最大列名称，然后根据该值获取平均值。

cols = ['Cycle (seconds)', 'Run (seconds)', 'Swim (seconds)']

max_col = max(cols, key=lambda col: DataTD[col].mean())
print('Column name: ' + max_col)
print('Mean: ' + str(DataTD[max_col].mean()))

Answer 3

考虑样本数据

cols = ['Cycle (seconds)', 'Run (seconds)', 'Swim (seconds)']

np.random.seed([3, 1415])

DataTD = pd.DataFrame(
    np.random.randint(10, size=(10, 3)),
    list('ABCDEFGHIJ'), cols
)

   Cycle (seconds)  Run (seconds)  Swim (seconds)
A                0              2               7
B                3              8               7
C                0              6               8
D                6              0               2
E                0              4               9
F                7              3               2
G                4              3               3
H                6              7               7
I                4              5               3
J                7              5               9

IIUC：

使用带有参数mean的{{1}}后跟axis=1来查找最大值的索引。

idxmax

否则，请尝试

DataTD.loc[[DataTD[cols].mean(1).idxmax()]]

   Cycle (seconds)  Run (seconds)  Swim (seconds)
J                7              5               9

Answer 4

来自Pir的数据

DataTD.loc[DataTD[cols].mean(1).sort_values().iloc[[-1]].index]
Out[625]: 
   Cycle (seconds)  Run (seconds)  Swim (seconds)
J                7              5               9

最大系列＆＃39;与熊猫的意思

4 个答案: