结果:找到“groupby”相关内容23个,排序为按回复时间降序,搜索更多相关帖子请点击“高级”
pandas获取groupby分组里最大值所在的行方法
0 个回复 - 1560 次查看
import pandas as pd
df = pd.DataFrame({'Sp':['a','b','c','d','e','f'], 'Mt':['s1', 's1', 's2','s2','s2','s3'],
'Value':[1,2,3,4,5,6],
'Count':[3,2,5,10,10,6]
})
[/ ...
2022-1-25 17:36 - yunnandlg - python论坛
真心求教,关于python中groupby函数分组后提取指定数据的问题
1 个回复 - 1311 次查看
In[46]:
#分段处理数据,获取各段停留状态的时间差
for name,df in g:
x = np.array(df['时间差'].values)
#y = np.array(df['tag1'].values)
if x.shape[0] == 0:
continue
stayTim ...
2021-8-30 11:14 - 莹莹光 - python论坛
python中series的groupby
1 个回复 - 1350 次查看
今天在学习时,看到一个数据类型叫“SeriesGroupBy”,并且看到这样一个示例:>>> s = pd.Series([1, 2, 3, 4]) >>> s0 11 22 33 4dtype: int64 >>> s.
groupby([1, 1, 2, 2]).min()1 1
2 3第一次见到一 ...
2020-9-1 20:28 - zwy_0309 - python论坛
Groupby-Pandas-User Guide原文翻译5
0 个回复 - 935 次查看
DataFrame column selectionin GroupBy¶
Once you have created the GroupBy object from a DataFrame, youmight want to do something different for each of the columns. Thus, using [] similar to gett ...
2020-5-16 13:30 - sunrun19840306 - python论坛
Groupby-Pandas-User Guide原文翻译4
0 个回复 - 494 次查看
Grouping DataFrame withIndex levels and columns¶A DataFrame may be grouped by a combination of columns and indexlevels by specifying the column names as strings and the index levels as pd.Grouper ...
2020-5-15 08:38 - sunrun19840306 - python论坛
Groupby-Pandas-User Guide原文翻译3
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GroupBy with MultiIndex¶514With hierarchically-indexeddata, it’s quite natural to group byone of the levels of the hierarchy.Let’s create a Series with a two-level MultiIndex.GroupBy多索引,伴随 ...
2020-5-14 16:04 - sunrun19840306 - python论坛
Groupby-Pandas-User Guide原文翻译2
0 个回复 - 699 次查看
Note that
groupbywill preserve the order in which observationsare sorted withineach group. For example, the groups created by
groupby()below are in the order they appeared in the original DataFrame: ...
2020-5-13 09:05 - sunrun19840306 - python论坛