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​​​​​​​​​​​​​​​​​​Conferences

2024

  • Le Roux, N.J. & Rossouw, R. Biplot Visualizations of Variation Over Time in Compositional Data. CoDaWork, Girona, Spain, 3 – 7 June 2024. 
  • Groenen, P.J.F. MM Algorithms in Data Science. Plenary presentation at the conference of the International Federation of Classification Societies, San Jose, Costa Rica, 15 – 19 July 2024.
  • Lubbe, S. A collection of biplots for classification. Plenary presentation at the conference of the International Federation of Classification Societies, San Jose, Costa Rica, 15 – 19 July 2024.
  • Schoonees, P. & le Roux, N.J. Model Selection for Linear Regression Under Data Aggregation. Conference of the International Federation of Classification Societies, San Jose, Costa Rica, 15 – 19 July 2024. 
  • Ganey, R. & Lubbe, S. A Canonical Variate Analysis Biplot based on the Generalised Singular Value Decomposition. ICORS meets DSSV 2024, Washington, USA, 29 July - 1 August 2024.
  • Lubbe, S., le Roux, N.J., Nienkemper-Swanepoel, J., Ganey, R., Buys, R., Adams, Z. & Manefeldt, P. User-friendly biplots in R with biplotEZ. Special interest group: Multivariate Data Analysis Group (MDAG) workshop for the 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 November 2024.
  • Adams, Z. & Nienkemper-Swanepoel, J. The past, present and future of visualising sentiments. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Buys, R., Sandilands, D., Lubbe, S. & van der Merwe, C. bipl5: An R package for reactive calibrated axes biplots. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Coetzer, R. Experimental designs for estimating non-linear models in mixture variables. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Ganey, R. & Laurens, S. Logratio analysis (LRA) and compositional biplots of milk fatty acids. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Ganey, R. & Nienkemper-Swanepoel, J. Mapping linguistic beauty: biplot analysis of 228 world language patterns. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Lubbe, S. Timeseries PCA biplots. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Ramaisa, M. & Nienkemper-Swanepoel, J. GPAbin biplots for continuous data: a methodology for combining biplots of completed continuous data sets. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • Sebatjane, P., Lubbe, S. & le Roux, N. Compositional bipot approaches. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.
  • van der Westhuizen, S., Heuvelink, G.B.M., Hofmeyr, D.P., Poggio, L., Nussbaum, M. & Brungard, C. Mapping soil thickness by accounting for right-censored data with survival probabilities and machine learning. 65th Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 18 - 22 November 2024.


2023

  • Beh, E.J. & Lombardo, R. An introduction to correspondence analysis using the Cressie-Read family of divergence statistics. Plenary speaker. 8th International Conference on Mathematics and Natural Sciences (ICMS2023), Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, Indonesia, 10 – 11 February 2023.
  • Pickard, S. R., Eidels, A., Beh, E. J. & Blaha, L. M. Detecting a loss of situational awareness, Australasian Society for Experimental Psychology Conference, Research School of Psychology, Australian National University, ACT, Australia, 12 – 14 April, 2023.
  • Adams, Z & Nienkemper-Swanepoel, J. Visualising opinions on the COVID-19 pandemic. Poster presented. Data Science, Statistics and Visualisation Conference, University of Antwerpen, 5 – 7 July 2023.
  • Le Roux, N.J. & Lubbe, S. Predictive biplots for individual differences scaling (INDSCAL) models. Invited paper presented. Data Science, Statistics and Visualisation Conference, University of Antwerpen, 5 – 7 July 2023.
  • Manefeldt, P., Lamont, M & Lubbe, S. Visualising interpretability of random forest models. Invited paper presented. Data Science, Statistics and Visualisation Conference, University of Antwerpen, 5 – 7 July 2023.
  • Schoonees, P. & le Roux, N.J. The effect of data aggregation on ordinary least squares estimation and model selection procedures. Invited paper presented. Data Science, Statistics and Visualisation Conference, University of Antwerpen, 5 – 7 July 2023.
  • Steyn, L., de Wet, T., De Baets, B & Luca, S. Open-Set Recognition with Second-Order Extreme Value Theory, Invited paper presented. Data Science, Statistics and Visualisation Conference, University of Antwerpen, 5 – 7 July 2023.
  • Alzahrani, A. A., Beh, E. J. & Stojanovski, E. A visual examination of Selikoff’s 20-year rule using correspondence analysis and the Cressie-Read family of divergence statistics, 25th International Congress on Modelling and Simulation (MODSIM2023), Darwin Convention Centre, Darwin, Australia, 9 – 13 July 2023.
  • Beh, E. J. & Lombardo, R. Assessing dispersion in a two-way contingency table under profile transformations and reciprocal averaging, 25th International Conference on Computational Statistics (COMPSTAT2023),  22 – 25 August 2023.
  • Ganey, R. High-dimensional LDA biplot through the GSVD. 25th International Conference on Computational Statistics (COMPSTAT2023),  22 – 25 August 2023.
  • Lombardo, R., Beh, E. J., Ceriello, A., Lucisano, G., Prattichizzo, F. & Nicolucci, A. Visualizing departures from symmetry and Bowker’s chi-squared statistic: A study on cardiovascular risk among patients with diabetes, 25th International Conference on Computational Statistics (COMPSTAT2023),  22 – 25 August 2023.
  • Nienkemper-Swanepoel, J. le Roux, N.J. & Lubbe, S. The impact of (un)congenial multiple imputation approaches on GPAbin biplots. 25th International Conference on Computational Statistics (COMPSTAT2023),  22 – 25 August 2023.​
  • Beh, E. J. & Lombardo. R. The Cressie-Read family of divergence statistics and correspondence analysis for two-way and multi-way contingency tables. Correspondence Analysis and Related Methods Conference (CARME2023), University of Bonn, Germany, 26 – 29 September 2023.
  • Lubbe, S. The biplot zone for exploring truths in mixed scaled measurements. Correspondence Analysis and Related Methods Conference (CARME2023), University of Bonn, Germany, 26 – 29 September 2023.
  • Schoonees, P. & le Roux, N.J. Linear regression estimation and model selection under data aggregation. Correspondence Analysis and Related Methods Conference (CARME2023), University of Bonn, Germany, 26 – 29 September 2023.​
  • Beh, E. J. & Lombardo, R. Sparseness in contingency tables: pro’s and con’s of Simple correspondence analysis and its variants, Third International Conference on Applied Statistics (ICAS): Statistical Modeling in Fast Technological Developments, Department of Statistics, Padjadjaran University, Indonesia, 1 – 2 November, 2023.
  • Lombardo, R. & Beh, E. J. Categorical Data Visualisation through the Variants of Correspondence Analysis. Special interest group: Multivariate Data Analysis Group (MDAG) workshop for the 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 28 November 2023.
  • Adams, Z. & Nienkemper-Swanepoel, J. Embedded word MCA biplots for sentiment and topic visualisation. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Buys, R. biplo5: An R Package for Reactive Calibrated Axes PCA Biplots. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Ganey, R & Lubbe, S. A Canonical Variate Analysis Biplot based on the Generalized Singular Value Decomposition. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Liebenberg, S.C., Ebner, B. & Visagie, J. A new omnibus test of fit based on a characterisation of the uniform distribution. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Laurens, S. & Ganey, R. Understanding the Complexity of Fatty Acid Profiles in Milk with Compositional Data Analysis. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Lubbe, S., le Roux, N., Nienkemper-Swanepoel, J., Ganey, R., Adams, Z. & Buys, R. BiplotEZ R package for EZier biplots. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Mabaso, N., Coetzer, R. & Liebenberg, S. Efficient selection of initial values in active learning. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Manefeldt, P.C., Lamont, M. & Lubbe, S. Extending Random Forest Biplots through Manifold Exploration. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Nienkemper-Swanepoel, J., le Roux, N. & Lubbe, S. GPAbin MCA biplots to recover categorical response patterns after multiple imputation. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Ramaisa, M. & Nienkemper-Swanepoel, J. Extending GPAbin biplots for continuous data: A methodology for biplot visualisations for continuous completed data sets. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Sebatjane, P. Lubbe, S. & le Roux, N. Visualization of compositional data. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • van der Westhuizen, S. Heuvelink, G. & Lubbe, S. Biplots for understanding machine learning predictions in digital soil mapping. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Uys, D.W. The James-Stein estimator. 64th Annual conference of the South African Statistical Association (SASA), Durban, South Africa, 29 November – 1 December 2023.
  • Guilbault, E., Renner, I., Beh, E. J. & Mahony, M. How to accommodate uncertain observations and data quality in species distribution modeling using point process models. 16th International Conference of the ERCIM WG on Computational and Methodological Statistics (CMStatistics2023), University of Applied Sciences, Berlin, Germany, 16 – 18 December 2023.

2022 ​

  • Beh, E. J. & Lombardo, R. On the biplot for contingency tables with ordinal variables: features of the configuration obtained using orthogonal polynomials generated from Emerson’s recurrence formulae, National Institute for Applied Statistics Research, Australia (NIASRA) Seminar Series, University of Wollongong, 1 April 2022.
  • Beh, E. J. The good, the bad and the ugly of data visualisation: Examples from the news and social media, School of Psychological Sciences, University of Newcastle, 17 March 2022.
  • Beh, E. J. The good, the bad and the ugly of data visualisation: Examples from the news and social media, Bachelor of Science Students, University of Newcastle, 4 April 2022.
  • Wang T.-W. & Beh, E.J. Quantitative analysis, power transformations and categorical data visualisation. Data Science, Statistics and Visualisation Conference, National Cheng Kung University, Taiwan, 27 – 29 June 2022.
  • Adams, Z., Nienkemper-Swanepoel, J., le Roux, N.J. & Lubbe, S. Embedded word MCA biplots for sentiment visualisation: Application to COVID-19 related Tweets, 17th Conference of the International Federation of Classification Societies (IFCS2022), Porto, Portugal, 19 – 23 July 2022.
  • Beh, E. J. & Lombardo, R. Categorical data visualisation and the Cressie-Read family of divergence statistics, 17th Conference of the International Federation of Classification Societies (IFCS2022), Porto, Portugal, 19 – 23 July 2022. 
  • Lombardo, R. & Beh, E. J. Categorical data analysis and visualisation, Invited workshop for the 17th Conference of the International Federation of Classification Societies (IFCS2022), Porto, Portugal, 19 – 23 July 2022.
  • Beh, E. J. & Lombardo, R. The Cressie-Read divergence statistic and correspondence analysis: A unifying approach with possible extensions, 24th International Conference on Computational Statistics (COMPSTAT2022), University of Bologna, Italy, 23 – 26 August 2022.
  • Nienkemper-Swanepoel​, J., le Roux, N.J. & Lubbe, S. Sensitivity analysis of the choice of multiple imputation approach on categorical GPAbin biplots, 24th International Conference on Computational Statistics (COMPSTAT2022), University of Bologna, Italy, 23 – 26 August 2022.
  • Wang, T.-W. & Beh, E. J. Comparison of power transformation approaches for reciprocal averaging, 24th International Confere​nce on Computational Statistics (COMPSTAT2022), University of Bologna, Italy, 23 – 26 August 2022.
  • le Roux, N. & Rossouw, R. Integrating a fundamental process-driven index and a data-driven production unit index for the multivariate monitoring of multiple production units​, 18th​ International Conference of Computational Met​hods in Sciences and Engineering. Heraklion, Crete, Greece, 26 – 29 October 2022.
  • Mostert, A.G., Coetzer, R.L.J. & Lubbe, S. Variable contributions based on pairwise PCA, 18th International Conference of Computational Met​hods in Sciences and Engineering. Heraklion, Crete, Greece, 26 – 29 October 2022.​
  • Lubbe, S. Visualising and Exploring Multi-Dimensional Sensory Data. 16th Sensometrics meeting. Online conference, 15 – 17 November 2022.
  • Adams, Z., Nienkemper-Swanepoel, J., le Roux, N. & Lubbe, S. Exploring sentiment contained in COVID-19 related Tweets with embedded word MCA biplots. 63rd Annual conference of the South African Statistical Association (SASA), George, South Africa, 30 November – 2 December 2022.
  • Lubbe, S. & le Roux, N.J. Biplots for invidual differences scaling models. 63rd Annual conference of the South African Statistical Association (SASA), George, South Africa, 30 November – 2 December 2022.

20​​21

  • ​​​​​Lubbe, S., le Roux, N.J., Nienkemper-Swanepoel, J. & van der Merwe, C.J. Correspondence analysis related biplot visualisations to aid analyses of categorical data containing missing values, 63rd International Statistics Institute (ISI) World Statistics Congress (WSC) 2021, Virtual, 12 – 15 July 2021. 
  • Ganey, R., Nienkemper-Swanepoel, J. & van der Merwe, C.J. Aspects of multidimensional visualisation. Special interest group: Multivariate Data Analysis Group (MDAG) workshop for the 62nd Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 29 November 2021.​
  • Nienkemper-Swanepoel, J., Lubbe, S. & le Roux, N.J. Extending GPAbin to visualise missing multivariate continuous data, 62nd Annual conference of the South African Statistical Association (SASA), Stellenbosch, South Africa, 1 – 3 December 2021. 
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