STOR Colloquium: Quefeng Li, UNC-Chapel Hill

Quefeng Li

Department of Biostatistics
UNC-Chapel Hill

Integrative linear discriminant analysis with guaranteed error rate improvement

Numerous empirical studies have found that integrative analysis of multimodal data can result in better statistical performance. However, little theory is known on when and why including more variables in a statistical model can improve the prediction. In the context of two-class classification, we provide a theoretical guarantee that running an integrative linear discriminant analysis on multimodal data achieves smaller misclassification error than running linear discriminant analysis on each individual data type. We explicitly characterize the trade-off between the extra information brought by multimodal data and the extra estimation error they bring. We also demonstrate that such a guarantee also applies to some other classifiers.

Refreshments will be served at 3:00pm in the 3^rd floor lounge of Hanes Hall