Presentations

International conferences

Warning: package 'lubridate' was built under R version 4.5.3
Date Title Event Location Details Author
2025-07-08 Exploring text in the wild: Analysing text data with Canonical Correspondence Analysis DSSV 2025 South Africa Contributed talk co-author
2025-07-08 GPAbin biplots for continuous data: Combining biplots of completed continuous data sets DSSV 2025 South Africa Contributed talk co-author
2025-07-07 Biplot visualisations to map climate change in African regions DSSV 2025 South Africa Invited talk presenting
2025-07-03 Part 1: Visualising Long-Term Shifts in African Climate Conditions Using Biplots NWU-Purdue 2025 South Africa Invited talk presenting
2025-07-03 Part 2: Dynamic Biplot Animations for Temporal Climate Pattern Exploration NWU-Purdue 2025 South Africa Invited talk presenting
2023-08-22 The impact of (un)congenial multiple imputation approaches on GPAbin biplots COMPSTAT 2023 hybrid, England Invited talk presenting
2023-07-05 Visualising opinions on the COVID-19 pandemic DSSV-ECDA 2023 Belgium Poster co-author
2022-08-26 Sensitivity analysis of the choice of multiple imputation approach on categorical GPAbin biplots COMPSTAT 2022 hybrid, Italy Contributed talk presenting
2022-07-22 Embedded word MCA biplots for sentiment visualisation: Application to COVID-19 related Tweet IFCS 2022 Portugal Invited talk co-author
2021-07-21 Correspondence analysis related biplot visualisations to aid analyses of categorical data containing missing values ISI-WSC 2021 online Invited talk presenting
2021-07-07 GPAbin for principal component analysis biplots of multiple imputed data DSSV-ECDA 2021 online Interactive talk presenting
2020-07-30 Missing Data: GPAbin biplots DSSV 2020 online Poster presenting
2019-08-28 A simulation study for the identification of missing data mechanisms using visualisations IFCS 2019 Greece Invited talk presenting
2019-06-07 GPAbin for data visualization in the presence of missing observations CoDaWork 2019 Spain Contributed talk co-author
2019-02-06 To impute or not to impute categorical data: applications of multiple correspondence analysis CARME 2019 South Africa Contributed talk presenting
2018-07-05 Visualising incomplete data with subset multiple correspondence analysis ECDA 2018 Germany Contributed talk presenting
2017-08-08 Challenges in visualising and imputing missing categorical data IFCS 2017 Japan Invited talk presenting
2017-07-13 The virtues and pitfalls of the visualisation of missing categorical data DSSV 2017 Portugal Contributed talk presenting
2016-08-23 Visualisations of multiple imputations using generalised orthogonal Procrustes analysis COMPSTAT 2016 Spain Contributed talk presenting
2015-07-29 Regularised Iterative Multiple Correspondence Analysis in Multiple Imputation ISI-WSC 2015 Brazil Contributed talk presenting
2015-07-07 Biplot based visualisations to explore relationships between pneumonia and nasopharyngeal pathogens IFCS 2015 Italy Contributed talk presenting

Seminars and workshops

Date Title Event Location Details
2026-02-13 GPAbin: an R package for unified visualisations of imputed data sets Stellenbosch University: Statistics Department South Africa Seminar
2025-11-25 Beyond multivariate applications: Quarto for reproducible interactive documents MDAG-SASA South Africa Workshop
2025-10-27 Dynamic biplot visualisations with moveEZ NITheCS Colloquium South Africa Colloquium
2025-10-13 My journey (so far) with R package development University of Cape Town seminar series South Africa Seminar
2025-05-22 GPAbin biplots to investigate differences between multiple imputation techniques available in R NUMBAT Monash Australia Seminar
2025-04-08 Two Perspectives, One Vision StatSNetSA Online Webinar
2024-11-18 User-friendly biplots in R with biplotEZ MDAG-SASA South Africa Workshop
2024-07-19 Multiple correspondence analysis biplot applications: missing data and text analysis CoE-MaSS Online Webinar
2023-11-23 The impact of early referral on milestone development of babies with Down Syndrome at the Bloemfontein Child Information Centre Annual Provincial Health Research Day Online Webinar
2023-08-02 User-friendly biplots in R with biplotEZ StatCon South Africa Workshop
2023-07-19 Postgraduate Research Opportunities in Statistics: Multivariate Data Visualisation NGA-MaSS Online Webinar
2022-10-14 GPAbin: unifying visualisations of multiple imputations for missing values Stellenbosch University: Statistics Department South Africa Research discussion
2022-10-14 Comments on early career collaborations PSACP Online Webinar
2022-05-05 Data lost but not forgotten Stellenbosch University: SUMS South Africa Seminar
2021-11-29 Aspects of multidimensional visualisations MDAG-SASA Online Workshop
2020-05-14 Multiple correspondence analysis applications for missing data visualisation CoE-MaSS Online Webinar
2020-02-14 Visualisations for multivariate missing data Stellenbosch University: Statistics Department South Africa Seminar
2019-11-26 Categorical data: Visualisation and missing values MDAG-SASA South Africa Workshop
2019-05-07 A missing data journey with multiple correspondence analysis applications University of the Western Cape South Africa Seminar
2017-08-28 STATS: what you need to know! Stellenbosch University: Genetics Department South Africa Seminar
2016-09-16 Visualisations of multiple imputations using generalised orthogonal Procrustes analysis Stellenbosch University: Statistics Department South Africa Seminar

Local conferences

Date Title Event Location Details Author
2025-11-28 Animated climate change biplots with moveEZ SASA 2025 Vanderbiljpark Contributed talk presenting
2025-11-28 Statistical analysis of emissions and performance of a wood-fulled stove for low-income households SASA 2025 Vanderbiljpark Contributed talk co-author
2025-11-26 Zooming in on text: Visualising documents and terms with canonical correspondence analysis SASA 2025 Vanderbiljpark Contributed talk co-author
2025-09-06 The impact of early referral on milestone development of babies with down syndrome at the bloemfontein child information centre, South Africa SAPA 2024 Gqeberha Contributed talk co-author
2024-11-22 Mapping linguistic beauty: biplot analysis of 228 world language patterns SASA 2024 Stellenbosch Contributed talk co-author
2024-11-21 GPAbin biplots for continuous data: a methodology for combining biplots of completed continuous data sets SASA 2024 Stellenbosch Contributed talk co-author
2024-11-20 The past, present and future of visualising sentiments SASA 2024 Stellenbosch Contributed talk co-author
2024-07-04 The impact of early referral on milestone development of babies with Down Syndrome at the Bloemfontein Child Information Centre OTASA 2024 Online Contributed talk co-author
2023-12-01 GPAbin MCA biplots to recover categorical response patterns after multiple imputation SASA 2023 Durban Contributed talk presenting
2023-12-01 Extending GPAbin biplots for continuous data: A methodology for biplot visualisations for continuous completed data sets SASA 2023 Durban Contributed talk co-author
2023-12-01 BiplotEZ R package for EZier biplots SASA 2023 Durban Contributed talk co-author
2023-11-30 Embedded word MCA biplots for sentiment and topic visualisation SASA 2023 Durban Contributed talk co-author
2022-11-30 Exploring sentiment contained in COVID-19 related Tweets with embedded word MCA biplots SASA 2022 George Contributed talk co-author
2021-12-01 Extending GPAbin to visualise missing multivariate continuous data SASA 2021 Stellenbosch Contributed talk presenting
2019-11-27 Extended applications of GPAbin biplots SASA 2019 Gqeberha Contributed talk presenting
2018-11-27 Visualisations for identifying missing data mechanisms SASA 2018 Johannesburg Contributed talk presenting
2017-11-30 Competing approaches to the visualisation of incomplete categorical data sets SASA 2017 Bloemfontein Contributed talk presenting
2016-12-01 Multidimensional graphical comparisons of imputation methods for missing values in categorical data sets SASA 2016 Cape Town Contributed talk presenting
2015-12-02 Generalised Orthogonal Procrustes Analysis for the comparison of Multiple imputed data sets SASA 2015 Pretoria Contributed talk presenting
2014-10-30 Regularised Iterative Multiple Correspondence Analysis in Multiple Imputation SASA 2014 Makhanda Contributed talk presenting
2013-11-07 Regularised Iterative Multiple Correspondence Analysis in Multiple Imputation SASA 2013 Polokwane Contributed talk presenting
2011-11-01 The ranking of preferable positions for an A Cappella group considering feasible factors SASA 2011 Pretoria Contributed talk presenting