Research page
My main research interests are in nonparametric and high-dimensional statistics. Particular topics include shape-constrained density and other nonparametric function estimation problems, nonparametric classification, clustering and regression, the bootstrap and high-dimensional variable selection problems.
Publications and Preprints
- Cule, M. L. and Samworth, R. J. (2009), Theoretical properties of the log-concave maximum likelihood estimator of a multidimensional density. Preprint . (.pdf, 213K)
- Cule, M. L., Samworth, R. J. and Stewart, M. I. (2009), Maximum likelihood estimation of a multidimensional log-concave density, submitted. (.pdf, 1.5M). A longer version of the paper is also available here: (.pdf, 1.5M)
- Samworth, R .J. and Wand, M. P. (2009), Asymptotics and optimal bandwidth selection for highest density region estimation, Ann. Statist., to appear. (.pdf, 1.4M)
- Fan, J., Samworth, R. and Wu, Y. (2009), Ultrahigh dimensional feature selection: beyond the linear model, J. Machine Learning Research, 10, 2013--2038. (.pdf, 256K).
- Fan, J., Feng, Y., Samworth, R. J. and Wu, Y. (2009), SIS, An R package for (Iterative) Sure Independence Screening for generalized linear models and Cox's proportional hazards models, available from CRAN
- Cule, M. L., Gramacy, R. B. and Samworth, R. J. (2009), LogConcDEAD: an R package for maximum likelihood estimation of a multivariate log-concave density, J. Statist. Software, 29, Issue 2.
- Gramacy, R. B., Samworth, R. J. and King, R. (2009), Importance tempering, Statistics and Computing, to appear. (.pdf, 152K)
- Hall, P., Park, B. U. and Samworth, R. J. (2008), Choice of neighbour order in nearest-neighbour classification, Ann. Statist., 36, 2135-2152. (.pdf, 196K). A longer version of the paper is also available here: (.pdf, 236K)
- Samworth, R. J. (2008), Discussion of Sure independence screening for ultra-high dimensional feature space by Fan and Lv, J. Roy. Statist. Soc., Ser. B , 70, 888-889. (.pdf, 84K).
- Cule, M. L., Gramacy, R. B. and Samworth, R. J. (2007), LogConcDEAD, An R package for log-concave density estimation in arbitrary dimensions, available from CRAN
- Samworth, R. J. and Gowland, R. L. (2007), Estimation of adult skeletal age-at-death: statistical assumptions and applications, International Journal of Osteoarchaeology, 17, 174-188. (.pdf, 200K)
- Poore, H. R., Samworth, R. J., White, N. J., Jones, S. M. and McCave, I. N. (2006), Neogene overflow of northern component water at the Greenland-Scotland ridge, Geochem. Geophys. Geosyst., 7, Q06010, doi:10.1029/2005GC001085. (.pdf, 2.5M)
- Samworth, R. J. and Poore, H. R. (2005), Understanding past ocean circulations: a nonparametric regression case study, Statistical Modelling , 5, 289-307. (.pdf, 1.7M)
- Johnson, O. T. and Samworth, R. J. (2005), Central Limit Theorem and convergence to stable laws in Mallows distance, Bernoulli, 11, 829-845. (.pdf, 176K)
- Samworth, R. J. (2005), Small confidence sets for the mean of a spherically symmetric distribution, J. Roy. Statist. Soc., Ser. B, 67, 343-361. (.pdf, 512K)
- Hall, P. and Samworth, R. J. (2005), Properties of bagged nearest-neighbour classifiers, J. Roy. Statist. Soc., Ser. B, 67, 363-379. (.pdf, 300K).
- Samworth, R. J. (2004), Some mathematical and theoretical aspects of the bootstrap, Ph.D. thesis, University of Cambridge. (.pdf, 1.5M)
- Samworth, R. J. (2003), A note on methods of restoring consistency to the bootstrap, Biometrika, 90, 985-990. (.pdf, 164K)
- Samworth, R. J. and Johnson, O. T. (2005), The empirical process in Mallows distance, with application to goodness-of-fit tests, Preprint. (.pdf, 296K)
- Samworth, R. J. (2004), Some asymptotic results for the bootstrap distribution of the sample mean, Preprint . (.pdf, 228K)
- Samworth, R. J. (2003), Bootstrap diagnostics and inconsistency, Preprint . (.pdf, 280K)
- Samworth, R. J. (2000), Shrinkage Estimators , Part III Essay, University of Cambridge. (.pdf, 288K)