A list of presentations is given on a separate page. To export citations, see Google Scholar or ORCID.

Monograph
McNicholas, P.D. (2016), Mixture Model-Based Classification. Boca Raton: Chapman & Hall/CRC Press. [webpage]

Opinion
McNicholas, P.D. (2016), 'Turning the spit: A perspective on the NSERC Discovery Grant review process', Liaison 30(4), 45-55. [pdf]

Recent Preprints
Gallaugher, M.P.B. and McNicholas, P.D. (2017), 'On fractionally-supervised classification: Weight selection and extension to the multivariate t-distribution', arXiv preprint arXiv:1709.08258.

Wei, Y. and McNicholas, P.D. (2017), 'Flexible high-dimensional unsupervised learning with missing data', arXiv preprint arXiv:1706.06185.

Tang, Y. and McNicholas, P.D. (2017), 'Clustering Airbnb reviews', arXiv preprint arXiv:1705.03134.

Pesevski, A., Franczak, B.P. and McNicholas, P.D. (2017), 'Subspace clustering with the multivariate-t distribution', arXiv preprint arXiv:1706.08927.

Wei, Y. and McNicholas, P.D. (2017), 'Flexible high-dimensional unsupervised learning with missing data', arXiv preprint arXiv:1706.06185.

Tang, Y., Browne, R.P. and McNicholas, P.D. (2017), 'Asymmetric clustering for high-dimensional data via mixtures of joint generalized hyperbolic models', arXiv preprint arXiv:1705.03130.

Gallaugher, M.P.B. and McNicholas, P.D. (2017), 'Three skewed matrix variate distributions', arXiv preprint arXiv:1704.02531.

Gallaugher, M.P.B. and McNicholas, P.D. (2017), 'A mixture of matrix variate skew-t distributions', arXiv preprint arXiv:1703.08882.

Wei, Y., Shireman, E., McNicholas, P.D., Steinley, D.L. (2017), 'Extending growth mixture models using continuous non-elliptical distributions', arXiv preprint arXiv:1703.08723.

Wei, Y. and McNicholas, P.D. (2017), 'Mixtures of generalized hyperbolic distributions and mixtures of skew-t distributions for model-based clustering with incomplete data', arXiv preprint arXiv:1703.02177.

Articles In Press
Punzo, A. Mazza, A., and McNicholas, P.D., 'ContaminatedMixt: An R package for fitting parsimonious mixtures of multivariate contaminated normal distributions', Journal of Statistical Software. To appear.

Andrews, J.L, Wickins, J.R., Boers, N.M. and McNicholas, P.D., 'teigen: An R package for model-based clustering and classification via the multivariate t distribution', Journal of Statistical Software. To appear.

2017
Skinnider, M.A., Dejong, C.A., Franczak, B.C., McNicholas, P.D. and Magarvey, N.A. (2017), 'Comparative analysis of chemical similarity methods for modular natural products with a hypothetical structure enumeration algorithm', Journal of Cheminformatics 9:46. [doi] (open access)

Murray, P.M., Browne, R.P. and McNicholas, P.D. (2017), 'Hidden truncation hyperbolic distributions, finite mixtures thereof, and their application for clustering', Journal of Multivariate Analysis 161, 141-156. [doi] (open access)

Punzo, A. and McNicholas, P.D. (2017), 'Robust clustering in regression analysis via the contaminated Gaussian cluster-weighted model', Journal of Classification 34(2), 249-293. [doi]

Murray, P.M., Browne, R.P. and McNicholas, P.D. (2017), 'A mixture of SDB skew-t factor analyzers', Econometrics and Statistics 3, 160-168. [doi] [preprint]

Gallaugher, M.P.B. and McNicholas, P.D. (2017), Discussion of 'Random-projection ensemble classification’ by Cannings and Samworth, Journal of the Royal Statistical Society: Series B 79(4), 1011-1012. [doi]

Gallaugher, M.P.B. and McNicholas, P.D. (2017), 'A matrix variate skew-t distribution', Stat 6(1), 160-170. [doi] [preprint]

Dang, U.J., Punzo, A., McNicholas, P.D., Ingrassia, S. and Browne, R.P. (2017), 'Multivariate response and parsimony for Gaussian cluster-weighted models', Journal of Classification 34(1), 4-34. [doi]

Cheam, A.S.M., Marbac, M., and McNicholas, P.D. (2017), 'Model-based clustering for spatio-temporal data on air quality monitoring', Environmetrics 28(3), e2437. [doi]

McNicholas, S.M., McNicholas, P.D., and Browne, R.P. (2017), A mixture of variance-gamma factor analyzers. In Ahmed, S.E., editor, Big and Complex Data Analysis. Cham: Springer International Publishing, pp. 369-385. [doi]

Wong, M.H.T., Mutch, D.M., and McNicholas, P.D. (2017), 'Two-way learning with one-way supervision for gene expression data', BMC Bioinformatics 18:150. [doi]

2016
Franczak, B.C., Castura, J.C., Browne, R.P., Findlay, C.J. and McNicholas, P.D.(2016) 'Handling missing data in consumer hedonic tests arising from direct scaling: Imputation techniques for consumer hedonic tests', Journal of Sensory Studies 31(6), 514-523. [doi]

Marbac, M. and McNicholas, P.D. (2016), 'Dimension reduction in clustering', Wiley StatsRef: Statistics Reference Online. [doi].

Tortora, C., McNicholas, P.D. and Browne, R.P. (2016), 'A mixture of generalized hyperbolic factor analyzers', Advances in Data Analysis and Classification 10(4), 423-440. [doi]

McNicholas, P.D. (2016), 'Model-based clustering', Journal of Classification 33(3), 331-373. [doi] (open access)

Punzo, A. and McNicholas, P.D. (2016), 'Parsimonious mixtures of multivariate contaminated normal distributions', Biometrical Journal 58(6), 1506-1537. [doi]

Punzo, A., Browne, R.P. and McNicholas, P.D. (2016), 'Hypothesis testing for mixture model selection', Journal of Statistical Computation and Simulation 86(14), 2797-2818. [doi]

Azzalini, A., Browne, R.P., Genton, M.G. and McNicholas, P.D. (2016), 'On nomenclature for, and the relative merits of, two formulations of skew distributions', Statistics and Probability Letters 110, 201-206 [doi]

McNicholas, P.D. and Subedi, S. (2016), Discussion of 'Perils and potentials of self-selected entry to epidemiological studies and surveys' by Keiding ad Louis, Journal of the Royal Statistical Society: Series A 179(2), 362-363. [doi]

Morris, K. and McNicholas, P.D. (2016), 'Clustering, classification, discriminant analysis, and dimension reduction via generalized hyperbolic mixtures', Computational Statistics and Data Analysis 97 133-150. [doi]

Cheam, A.S.M. and McNicholas, P.D. (2016), 'Modelling receiver operating characteristic curves using Gaussian mixtures', Computational Statistics and Data Analysis 93, 192-206. [doi]

O’Hagan, A., Murphy, T.B., Gormley, I.C., McNicholas, P.D. and Karlis, D. (2016), ‘Clustering with the multivariate normal inverse Gaussian distribution’, Computational Statistics and Data Analysis 93, 18-30. [doi]

2015
Dang, U.J., Browne, R.P. and McNicholas, P.D. (2015), 'Mixtures of multivariate power exponential distributions', Biometrics 71(4), 1081-1089. [doi]

Vrbik, I. and McNicholas, P.D. (2015), 'Fractionally-supervised classification', Journal of Classification 32(3), 359-381. [doi]

Subedi, S., Punzo, A., Ingrassia, S. and McNicholas, P.D. (2015), 'Cluster-weighted t-factor analyzers for robust model-based clustering and dimension reduction', Statistical Methods and Applications 24(4), 623-649. [doi]

Browne, R.P. and McNicholas, P.D. (2015), 'Multivariate sharp quadratic bounds via Σ-strong convexity and the Fenchel connection', Electronic Journal of Statistics 9(2), 1913-1938. [doi]

Wei, Y. and McNicholas, P.D. (2015), 'Mixture model averaging for clustering', Advances in Data Analysis and Classification 9(2), 197-217. [doi]

Browne, R.P. and McNicholas, P.D. (2015), 'A mixture of generalized hyperbolic distributions', Canadian Journal of Statistics 43(2), 176-198. [doi]

Franczak, B.C., Browne, R.P., McNicholas, P.D. and Findlay, C.J. (2015), 'Product Selection for Liking Studies: The Sensory Informed Design', Food Quality and Preference 44, 36-43. [doi]

Franczak, B.C., Tortora, C., Browne, R.P. and McNicholas, P.D. (2015), 'Unsupervised learning via mixtures of skewed distributions with hypercube contours', Pattern Recognition Letters 58(1), 69-76. [doi]

Dang, U.J and McNicholas, P.D. (2015), Families of parsimonious finite mixtures of regression models. In: Morlini, I., Minerva T. and Vichi, M., editors, Advances in Statistical Models for Data Analysis, Studies in Classification, Data Analysis, and Knowledge Organization. Cham: Springer International Publishing, pp. 73-84. [eBook]

Tang, Y., Browne, R.P. and McNicholas, P.D. (2015), ‘Model-based clustering of high-dimensional binary data’, Computational Statistics and Data Analysis 87, 84-101. [doi]

Subedi, S. and McNicholas, P.D. (2015), Discussion of 'Analysis of forensic DNA mixtures with artefacts' by Cowell et al., Journal of the Royal Statistical Society: Series C 64(1), 43-44. [doi]

2014
Coneva, V., Simopoulos, C., Casaretto, J.A., El-kereamy, A., Guevara, D.R., Cohn, J., Zhu, T., Guo, L., Alexander, D.C., Bi, Y.-M., McNicholas, P.D. and Rothstein, S.J. (2014), ‘Metabolic and co-expression network-based analyses associated with nitrate response in rice’, BMC Genomics 15:1056. [doi]

Ralston, J., Badoud, F., Cattrysse, B., McNicholas, P.D. and Mutch, D.M. (2014), 'Inhibition of stearoyl-CoA desaturase-1 in differentiating 3T3-L1 pre-adipocytes up-regulates Elongase 6 and down-regulates genes affecting triacylglycerol synthesis', International Journal of Obesity. 38, 1449-1456. [doi]

Misyura, M., Guevara, D., Subedi, S., Hudson, D., McNicholas, P.D., Colasanti, J. and Rothstein, S.J. (2014), 'Nitrogen limitation and high density responses in rice suggest a role for ethylene in intraspecific competition', BMC Genomics 15:681. [doi]

Andrews, J.L. and McNicholas, P.D. (2014), 'Variable selection for clustering and classification', Journal of Classification 31(2), 136-153. [doi]

Franczak, B.C., Browne, R.P. and McNicholas, P.D. (2014), 'Mixtures of shifted asymmetric Laplace distributions', IEEE Transactions on Pattern Analysis and Machine Intelligence 36(6), 1149-1157. [doi]

Browne, R.P. and McNicholas, P.D. (2014), 'Estimating common principal components in high dimensions', Advances in Data Analysis and Classification 8(2), 217-226. [doi]

Subedi, S. and McNicholas, P.D. (2014), 'Variational Bayes approximations for clustering via mixtures of normal inverse Gaussian distributions', Advances in Data Analysis and Classification 8(2), 167-193. [doi]

Murray, P.M., Browne, R.P. and McNicholas, P.D. (2014), 'Mixtures of skew-t factor analyzers', Computational Statistics and Data Analysis 77, 326-335 (open access). [doi]

Murray, P.M., McNicholas, P.D. and Browne, R.P. (2014), 'A mixture of common skew-t factor analyzers', Stat 3(1), 68-82. [doi]

Bhattacharya, S. and McNicholas, P.D. (2014), 'A LASSO-penalized BIC for mixture model selection', Advances in Data Analysis and Classification 8(1), 45-61. [doi]

Lin, T.-I., McNicholas, P.D. and Hsiu, J.H. (2014), 'Capturing patterns via parsimonious t mixture models', Statistics and Probability Letters 88, 80-87. [doi]

Browne, R.P. and McNicholas, P.D. (2014), 'Orthogonal Stiefel manifold optimization for eigen-decomposed covariance parameter estimation in mixture models', Statistics and Computing 24(2), 203-210. [doi].

Xia, Y. and McNicholas, P.D. (2014), 'A gradient method for the monotone fused least absolute shrinkage and selection operator', Optimization Methods and Software 29(3), 463-483. [doi]

Vrbik, I. and McNicholas, P.D. (2014), 'Parsimonious skew mixture models for model-based clustering and classification', Computational Statistics and Data Analysis 71, 196-210. [doi]

2013
McNicholas, P.D., Browne, R.P. and Murray, P.M. (2013), Discussion of 'Model-based clustering and classification with non-normal mixture distributions' by Lee and McLachlan, Statistical Methods and Applications 22(4), 467-472. [doi]

Browne, R.P. and McNicholas, P. D. (2013), Mixture and latent class models in longitudinal and other settings. In Scott, M.A., Simonoff, J.S., and Marx, B.D., editors, The SAGE Handbook of Multilevel Modelling. SAGE Publications Ltd., pp. 357-370.

McNicholas, P. D. (2013). Model-based clustering and classification via mixtures of multivariate t-distributions. In Guidici, P., Ingrassia, S. and Vichi, M., editors, Statistical Models for Data Analysis, Studies in Classification, Data Analysis, and Knowledge Organization. Cham: Springer International Publishing, pp. 233-240.

Morris, K., McNicholas, P.D. and Scrucca, L. (2013), 'Dimension reduction for model-based clustering via mixtures of multivariate t-distributions', Advances in Data Analysis and Classification 7(3), 321-338. [doi]

Morris, K. and McNicholas, P.D. (2013), 'Dimension reduction for model-based clustering via mixtures of shifted asymmetric Laplace distributions', Statistics and Probability Letters 83(9), 2088-2093. [doi] [erratum]

McNicholas, P.D. and Browne, R.P. (2013), Discussion of 'How to find an appropriate clustering for mixed-type variables with application to socio-economic stratification' by Hennig and Liao, Journal of the Royal Statistical Society: Series C 62(3), 352-353. [doi]

Liseron-Monfils, C., Lewis, T., Ashlock, D., McNicholas, P.D., Fauteux, F., Stromvik, M. and Raizada, M.N. (2013), 'Promzea: A pipeline for discovery of co-regulatory motifs in maize and other plant species and its application to the anthocyanin and phlobaphene biosynthetic pathways and the Maize Development Atlas', BMC Plant Biology 13:42. [doi]

Andrews, J.L. and McNicholas, P.D. (2013), 'Using evolutionary algorithms for model-based clustering ', Pattern Recognition Letters 34(9), 987-992. [doi]

Humbert, S., Subedi, S., Cohn, J., Zeng, B., Bi, Y.-M., Chen, X., Zhu, T., McNicholas, P.D., and Rothstein, S.J. (2013), 'Genome-wide expression profiling of maize in response to individual and combined water and nitrogen stresses', BMC Genomics 14(3) [doi].

Subedi, S., Punzo, A., Ingrassia, S. and McNicholas, P.D. (2013), 'Clustering and classification via cluster-weighted factor analyzers', Advances in Data Analysis and Classification 7(1), 5-40. [doi]

2012
Wong, M.H.T., Holst, C., Astrup, A., Handjieva-Darlenska, T., Jebb, S.A., Kafatos, A., Kunesova, M., Larsen, T.M., Martinez, D.M., Pfeiffer, A.F.H., van Baak, M.A., Saris, W.H.M., McNicholas, P.D. and Mutch, D.M. (2012), 'Caloric restriction induces changes in insulin and body weight measurements that are inversely associated with subsequent weight regain', PLoS ONE 7(8), e42858. [doi].

Zulyniak, M.A., Ralston, J.C., Tucker, A.J., MacKay, K.A., Hillyer, L.M., McNicholas, P.D., Graham, T.E., Robinson, L.E., Duncan, A.M., Ma, D.W.L. and Mutch, D.M. (2012), 'Vaccenic acid in serum triglycerides is associated with markers of insulin resistance in men', Applied Physiology, Nutrition, and Metabolism 37(5), 1003-1007. [doi]

Browne, R.P. and McNicholas, P.D. (2012), 'Model-based clustering and classification of data with mixed type', Journal of Statistical Planning and Inference 142(11), 2976-2984. [doi]

Vrbik, I. and McNicholas, P.D. (2012), 'Analytic calculations for the EM algorithm for multivariate skew-t mixture models', Statistics and Probability Letters 82(6), 1169-1174. [doi]

McNicholas, P.D. and Subedi, S. (2012), 'Clustering gene expression time course data using mixtures of multivariate t-distributions', Journal of Statistical Planning and Inference 142(5), 1114-1127. [doi]

Feng, Z.Z., Yang, X., Subedi, S. and McNicholas, P.D. (2012), 'The LASSO and sparse least squares regression methods for SNP selection in predicting quantitative traits', IEEE Transactions on Computational Biology and Bioinformatics 9(2), 629-636. [doi]

Browne, R.P., McNicholas, P.D. and Sparling, M.D. (2012), 'Model-based learning using a mixture of mixtures of Gaussian and uniform distributions', IEEE Transactions on Pattern Analysis and Machine Intelligence 34(4), 814-817. [doi]

Andrews, J.L. and McNicholas, P.D. (2012), 'Model-based clustering, classification, and discriminant analysis via mixtures of multivariate t-distributions', Statistics and Computing 22(5), 1021-1029. [doi]

Steane, M.A., McNicholas, P.D. and Yada, R. (2012), 'Model-based classification via mixtures of multivariate t-factor analyzers'. Communications in Statistics -- Simulation and Computation 41(4), 510-523. [doi]

2011
McNicholas, P.D. (2011), 'On model-based clustering, classication, and discriminant analysis', Journal of the Iranian Statistical Society 10(2), 181-199. [pdf]

McNicholas, P.D., Murphy, T.B., Jampani, K.R., McDaid, A.F., and Banks, L. (2011), 'pgmm Version 1.0 for R: Model-based clustering and classification via latent Gaussian mixture models'. Technical Report 2011-320, Department of Mathematics and Statistics, University of Guelph. December 2011. [pdf]

Xu, R., McNicholas, P.D., Desmond, A.F. and Darlington, G.A. (2011), 'A first passage time model for long term survivors with competing risks', The International Journal of Biostatistics 7(1), Article 26. [doi]

Andrews, J.L. and McNicholas, P.D. (2011), 'Mixtures of modified t-factor analyzers for model-based clustering, classification, and discriminant analysis', Journal of Statistical Planning and Inference 141(4), 1479-1486. [doi]

Ashlock, D., Schonfeld, J. and McNicholas, P.D. (2011), 'Translation tables: A genetic code in a evolutionary algorithm'. In IEEE Congress on Evolutionary Computation (CEC), New Orleans, pp. 2685-2692. [doi]

Andrews, J.L. and McNicholas, P.D. (2011), 'Extending mixtures of multivariate t-factor analyzers', Statistics and Computing 21(3), 361-373. [doi]

Andrews, J.L., McNicholas, P.D. and Subedi, S. (2011), 'Model-based classification via mixtures of multivariate t-distributions', Computational Statistics and Data Analysis 55(1), 520-529. [doi]

Balka, J., Desmond, A.F. and McNicholas, P.D. (2011), 'Bayesian and likelihood inference for cure rates based on defective inverse Gaussian regression models', Journal of Applied Statistics 38(1), 127-144. [doi]

2010
McNicholas, P.D. and Murphy, T.B. (2010), 'Model-based clustering of microarray expression data via latent Gaussian mixture models', Bioinformatics 26(21), 2705-2712. [doi] [data]

Shaikh, M., McNicholas, P.D. and Desmond, A.F. (2010), 'A pseudo-EM algorithm for clustering incomplete longitudinal data', The International Journal of Biostatistics 6(1), Article 8. [doi]

McNicholas, P.D. and Murphy, T.B. (2010), 'Model-based clustering of longitudinal data', The Canadian Journal of Statistics 38(1), 153-168. [doi]

McNicholas, P.D. (2010), 'Model-based classification using latent Gaussian mixture models', Journal of Statistical Planning and Inference 140(5), 1175-1181. [doi]

McNicholas, P.D., Murphy, T.B., McDaid, A.F. and Frost, D. (2010), 'Serial and parallel implementations of model-based clustering via parsimonious Gaussian mixture models', Computational Statistics and Data Analysis 54(3), 711-723. [doi]

2007-2009
Balka, J., Desmond, A.F. and McNicholas, P.D. (2009), 'Review and implementation of cure models based on first hitting times for Wiener processes', Lifetime Data Analysis 15(2), 147-176. [doi]

McNicholas, P.D. and Zhao, Y.C. (2009), Association rules: An overview, in Y. Zhao, C. Zhang & L. Cao, eds, 'Post-Mining of Association Rules: Techniques for Effective Knowledge Extraction', IGI Global, pp. 1-10.

Fu, Y., Kim, L.-T. and McNicholas, P.D. (2009), 'Changes on enological parameters of white wine packaged in bag-in-box during secondary shelf life'. Journal of Food Science 74(8), C608-C618. [doi]

McNicholas, P.D. and Murphy, T.B. (2008), 'Parsimonious Gaussian mixture models', Statistics and Computing 18(3), 285-296. [doi]

McNicholas, P.D., Murphy, T.B. and O'Regan, M. (2008), 'Standardising the lift of an association rule', Computational Statistics and Data Analysis 52(10), 4712-4721. [doi]

McNicholas, P.D. (2007), 'Association rule analysis of CAO data (with discussion)', Journal of the Statistical and Social Inquiry Society of Ireland 36, 44-83.

Ahmad, K., Rogers, S., McNicholas, P.D. and Collins P. (2007), 'Narrowband UVB and PUVA in the treatment of mycosis fungoides: A retrospective study', Acta Dermato-Venereologica 87(5), 413-417. [doi]

Book Review
McNicholas, P.D. (2009), 'Multivariate and Probabilistic Analyses of Sensory Science Problems', Trends in Food Science and Technology 20, 108-109. [doi]