WebSep 29, 2024 · 我正在尝试构建一个表,其中包含按子组划分的组,每个子组的计数和平均值.比如我想转换如下数据框:对于一个看起来像这样的表,其中 interval 是一个更大的组, …
Pandas groupby(),agg()-如何在没有多索引的情况下返回结果?
WebGroup DataFrame using a mapper or by a Series of columns. A groupby operation involves some combination of splitting the object, applying a function, and combining the results. This can be used to group large amounts of data and compute operations on these groups. Parameters bymapping, function, label, or list of labels WebSep 24, 2024 · agg中的字典中的keys【键值】必须是dataframe中存在的列,否则报错. ② 指定Y. 指定对dataframe中的Y列进行聚合计算,字典中的键值可以是dataframe中不存在 … i\u0027m so out of shape meme
如何在Python中自定义这个数据帧上完成的.groupby操作的输出?_Python_Pandas_Dataframe…
WebYou can use Series.to_frame () and DataFrame.reset_index () methods to make the dataframe with two columns and then you only rename the columns. Like this: jobs = df.groupby ('Job') ['Salary'].mean () jobs = jobs.to_frame ().reset_index () jobs.columns = ['Unique_Job', 'Avg_Salary'] Share Improve this answer Follow answered Feb 13, 2016 at … WebMay 5, 2024 · 分组运算方法 agg () 针对某列使用agg ()时进行不同的统计运算 In [ 13 ]: df = pd.DataFrame ( { 'A': list ( 'XYZXYZXYZX' ), 'B': [ 1, 2, 1, 3, 1, 2, 3, 3, 1, 2 ], ...: 'C': [ 12, 14, 11, 12, 13, 14, 16, 12, 10, 19 ]}) ...: df ...: Out [ 13 ]: A B C 0 X 1 12 1 Y 2 14 2 Z 1 11 3 X 3 12 4 Y 1 13 5 Z 2 14 6 X 3 16 7 Y 3 12 8 Z 1 10 9 X 2 19 http://duoduokou.com/python/17494679574758540854.html i\u0027m so lucky to have you in my life quotes