Incorporating Graphical Structure of Predictors in Sparse Quantile Regression
在稀疏分位数回归中纳入预测变量的图结构AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以高维稀疏分位数回归为核心,并利用解释变量间的图结构改进估计、选择与预测,直接对应分位数方向。
在稀疏分位数回归中纳入预测变量的图结构AI 解读 ↓
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Quantile regression in high-dimensional settings is useful in analyzing high-dimensional heterogeneous data. In this article, different from existing methods in quantile regression which treat all the predictors equally with the same priori, we take advantage of the graphical structure among predictors to improve the performance of parameter estimation, model selection, and prediction in sparse quantile regression. It is shown under mild conditions that the proposed method enjoys the model selection consistency and the oracle properties. An alternating direction method of multipliers algorithm with a linearization technique is proposed to implement the proposed method numerically, and its convergence is justified. Simulation studies are conducted, showing that the proposed method is superior to existing methods in terms of estimation accuracy and predictive power. The proposed method is also applied to a real dataset.
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