arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1009.3604cs.LG
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几何决策树

Geometric Decision Tree

Naresh Manwani, P. S. Sastry

摘要:

本文提出了一种学习斜决策树的新算法。目前的大多数决策树算法依赖于杂质措施,以评估在每个节点的超平面的优良性,同时学习决策树在自顶向下的方式。这些杂质测量不能正确地捕获数据中的几何结构。受此启发,我们的算法使用一种策略来评估超平面,以这样一种方式,即考虑到数据中的几何结构。在决策树的每个节点上,我们找到两个类的聚类超平面,并在该节点上使用它们的角平分线作为分割规则。我们通过实证研究表明,这种想法导致小决策树和更好的性能。我们还提出了一些分析表明,角平分线的聚类超平面,我们使用的分裂规则在每个节点上,是一个有趣的优化问题的解决方案,因此认为这是一个原则性的学习方法的决策树。

英文摘要:

In this paper we present a new algorithm for learning oblique decision trees. Most of the current decision tree algorithms rely on impurity measures to assess the goodness of hyperplanes at each node while learning a decision tree in a top-down fashion. These impurity measures do not properly capture the geometric structures in the data. Motivated by this, our algorithm uses a strategy to assess the hyperplanes in such a way that the geometric structure in the data is taken into account. At each node of the decision tree, we find the clustering hyperplanes for both the classes and use their angle bisectors as the split rule at that node. We show through empirical studies that this idea leads to small decision trees and better performance. We also present some analysis to show that the angle bisectors of clustering hyperplanes that we use as the split rules at each node, are solutions of an interesting optimization problem and hence argue that this is a principled method of learning a decision tree.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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