On Finding Rank Regret Representatives
On Finding Rank Regret Representatives
复制标题
论寻找排名遗憾代表
DOI:
10.1145/3531054
复制
发表时间:
2022
影响因子:
1.8
通讯作者:
Zhao, Jianwen
中科院分区:
文献类型:
--
作者:
Asudeh, Abolfazl;Das, Gautam;Jagadish, H. V.;Lu, Shangqi;Nazi, Azade;Tao, Yufei;Zhang, Nan;Zhao, Jianwen
Selecting the best items in a dataset is a common task in data exploration. However, the concept of “best” lies in the eyes of the beholder: Different users may consider different attributes more important and, hence, arrive at different rankings. Nevertheless, one can remove “dominated” items and create a “representative” subset of the data, comprising the “best items” in it. A Pareto-optimal representative is guaranteed to contain the best item of each possible ranking, but it can be a large portion of data. A much smaller representative can be found if we relax the requirement of including the best item for each user and instead just limit the users’ “regret.” Existing work defines regret as the loss in score by limiting consideration to the representative instead of the full dataset, for any chosen ranking function.However, the score is often not a meaningful number, and users may not understand its absolute value. Sometimes small ranges in score can include large fractions of the dataset. In contrast, users do understand the notion of rank ordering. Therefore, we consider items’ positions in the ranked list in defining the regret and propose therank-regret representativeas the minimal subset of the data containing at least one of the top-kof any possible ranking function. This problem is polynomial time solvable in two-dimensional space but is NP-hard on three or more dimensions. We design a suite of algorithms to fulfill different purposes, such as whether relaxation is permitted onk, the result size, or both, whether a distribution is known, whether theoretical guarantees or practical efficiency is important, and so on. Experiments on real datasets demonstrate that we can efficiently find small subsets with small rank-regrets.
登录
查看更多内容
DOI:
10.1016/0925-7721(92)90006-e
发表时间:
1992-11
期刊:
--
影响因子:
--
作者:
J. Matoušek
通讯作者:
J. Matoušek
影响因子:
0.8
作者:
M. Sharir;Shakhar Smorodinsky;G. Tardos
通讯作者:
G. Tardos
DOI:
--
发表时间:
2011
期刊:
arXiv.org
影响因子:
--
作者:
Sariel Har
通讯作者:
Sariel Har
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
H. Edelsbrunner;N. Hasan;R. Seidel;X. Shen
通讯作者:
X. Shen
影响因子:
0.8
作者:
T. Dey
通讯作者:
T. Dey