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arXiv 1104.1779stat.ME
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广义保序回归

Generalized Isotonic Regression

Ronny Luss, Saharon Rosset

摘要:

我们提出了一个计算和统计的方法来拟合保序模型下凸可微损失函数。我们提供了一个递归分区算法,可证明和有效地解决保序回归下的任何这样的损失函数。沿着划分路径的模型也是保序的,并且可以被视为问题的正则化解决方案。我们的方法概括并包含了两个先前的结果:Barlow和Brunk(1972)关于拟合特殊结构损失函数的保序回归的著名工作,以及标准(l2-损失)保序回归的递归分割算法(Spouge et al 2003)。我们证明了我们的广义算法的优势,在两种设置中的真实和模拟数据:拟合计数数据使用负泊松对数似然损失,和拟合鲁棒保序回归使用Huber的损失。

英文摘要:

We present a computational and statistical approach for fitting isotonic models under convex differentiable loss functions. We offer a recursive partitioning algorithm which provably and efficiently solves isotonic regression under any such loss function. Models along the partitioning path are also isotonic and can be viewed as regularized solutions to the problem. Our approach generalizes and subsumes two previous results: the well-known work of Barlow and Brunk (1972) on fitting isotonic regressions subject to specially structured loss functions, and a recursive partitioning algorithm (Spouge et al 2003) for the case of standard (l2-loss) isotonic regression. We demonstrate the advantages of our generalized algorithm on both real and simulated data in two settings: fitting count data using negative Poisson log-likelihood loss, and fitting robust isotonic regression using Huber's loss.

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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