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Random Subspace Learning Approach to High-Dimensional Outliers Detection

Bohan Liu, Ernest Fokoué
2015 Open Journal of Statistics  
We introduce and develop a novel approach to outlier detection based on adaptation of random subspace learning. Our proposed method handles both high-dimension low-sample size and traditional low-dimensional high-sample size datasets. Essentially, we avoid the computational bottleneck of techniques like Minimum Covariance Determinant (MCD) by computing the needed determinants and associated measures in much lower dimensional subspaces. Both theoretical and computational development of our
more » ... opment of our approach reveal that it is computationally more efficient than the regularized methods in high-dimensional low-sample size, and often competes favorably with existing methods as far as the percentage of correct outlier detection are concerned.
doi:10.4236/ojs.2015.56063 fatcat:hog2eml4ynd7vfuxfpuukjquzq