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arXiv 1802.09596stat.ML
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可调性:机器学习算法超参数的重要性

Tunability: Importance of Hyperparameters of Machine Learning Algorithms

Philipp Probst, Bernd Bischl, Anne-Laure Boulesteix

摘要:

现代监督机器学习算法涉及在运行它们之前必须设置的超参数。用于设置超参数的选项是来自软件包的默认值、由用户手动配置或通过调整程序将它们配置为最佳预测性能。本文的目的是双重的。首先,我们从统计的角度正式调整的问题,定义基于数据的默认值,并建议量化的超参数的算法的可调性的一般措施。其次,我们基于OpenML平台的38个数据集和六种常见的机器学习算法进行了大规模的基准测试研究。我们应用我们的措施来评估其参数的可调性。我们的结果产生超参数的默认值,使用户能够决定是否值得进行可能耗时的调整策略,专注于最重要的超参数,并选择适当的超参数空间进行调整。

英文摘要:

Modern supervised machine learning algorithms involve hyperparameters that have to be set before running them. Options for setting hyperparameters are default values from the software package, manual configuration by the user or configuring them for optimal predictive performance by a tuning procedure. The goal of this paper is two-fold. Firstly, we formalize the problem of tuning from a statistical point of view, define data-based defaults and suggest general measures quantifying the tunability of hyperparameters of algorithms. Secondly, we conduct a large-scale benchmarking study based on 38 datasets from the OpenML platform and six common machine learning algorithms. We apply our measures to assess the tunability of their parameters. Our results yield default values for hyperparameters and enable users to decide whether it is worth conducting a possibly time consuming tuning strategy, to focus on the most important hyperparameters and to chose adequate hyperparameter spaces for tuning.

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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