title: A novel kernel Fisher discriminant analysis: constructing informative kernel by decision tree ensemble for metabolomics data analysis.
abstract: Large amounts of data from high-throughput metabolomics experiments become commonly more and more complex, which brings an enormous amount of challenges to existing statistical modeling. Thus there is a need to develop statistically efficient approach for mining the underlying metabolite information contained by metabolomics data under investigation. In the work, we developed a novel kernel Fisher discriminant analysis (KFDA) algorithm by constructing an informative kernel based on decision tree ensemble. The constructed kernel can effectively encode the similarities of metabolomics samples between informative metabolites/biomarkers in specific parts of the measurement space. Simultaneously, informative metabolites or potential biomarkers can be successfully discovered by variable importance ranking in the process of building kernel. Moreover, KFDA can also deal with nonlinear relationship in the metabolomics data by such a kernel to some extent. Finally, two real metabolomics datasets together with a simulated data were used to demonstrate the performance of the proposed approach through the comparison of different approaches.
authors: Research Center of Modernization of Traditional Chinese Medicines, Central South University, Changsha, PR China.
authors: Dong-Sheng
authors: DS
authors: Cao
authors: Mao-Mao
authors: MM
authors: Zeng
authors: Lun-Zhao
authors: LZ
authors: Yi
authors: Bing
authors: B
authors: Wang
authors: Qing-Song
authors: QS
authors: Xu
authors: Qian-Nan
authors: QN
authors: Hu
authors: Liang-Xiao
authors: LX
authors: Zhang
authors: Hong-Mei
authors: HM
authors: Lu
authors: Yi-Zeng
authors: YZ
authors: Liang
mesh_terms: D000465:Algorithms; D015415:Biomarkers / Q000378:metabolism; D001786:Blood Glucose / Q000032:analysis; D003663:Decision Trees; D003920:Diabetes Mellitus / Q000378:metabolism; D016002:Discriminant Analysis; D006801:Humans; D055432:Metabolomics
chemical_list: D015415:Biomarkers; D001786:Blood Glucose