title: Lower confidence bounds for prediction accuracy in high dimensions via AROHIL Monte Carlo.
abstract: BACKGROUND
  Implementation and development of statistical methods for high-dimensional data often require high-dimensional Monte Carlo simulations. Simulations are used to assess performance, evaluate robustness, and in some cases for implementation of algorithms. But simulation in high dimensions is often very complex, cumbersome and slow. As a result, performance evaluations are often limited, robustness minimally investigated and dissemination impeded by implementation challenges. This article presents a method for converting complex, slow high-dimensional Monte Carlo simulations into simpler, faster lower dimensional simulations.
  
  
  RESULTS
  We implement the method by converting a previous Monte Carlo algorithm into this novel Monte Carlo, which we call AROHIL Monte Carlo. AROHIL Monte Carlo is shown to exactly or closely match pure Monte Carlo results in a number of examples. It is shown that computing time can be reduced by several orders of magnitude. The confidence bound method implemented using AROHIL outperforms the pure Monte Carlo method. Finally, the utility of the method is shown by application to a number of real microarray datasets.
authors.affiliation: Department of Epidemiology and Biostatistics and Institute of Bioinformatics, University of Georgia, Athens, GA, USA. dobbinke@uga.edu
authors.forename: Kevin K
authors.initials: KK
authors.lastname: Dobbin
authors.forename: Stephanie
authors.initials: S
authors.lastname: Cooke
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D006801:Humans; D015233:Models, Statistical; D009010:Monte Carlo Method; D020411:Oligonucleotide Array Sequence Analysis; D015203:Reproducibility of Results