Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Unravelling black box machine learning methods using biplots
Following the development of new mathematical techniques, the improvement of computer processing power and the increased availability of possible explanatory variables, the financial services industry is moving toward the use of new machine learning methods, such as neural networks, and away from ol...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Statistical Sciences
2020
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613231154987008 |
|---|---|
| access_status_str | Open Access |
| author | Rowan, Adriaan |
| author2 | Little, Francesca |
| author_browse | Little, Francesca Rowan, Adriaan |
| author_facet | Little, Francesca Rowan, Adriaan |
| author_sort | Rowan, Adriaan |
| collection | Thesis |
| description | Following the development of new mathematical techniques, the improvement of computer processing power and the increased availability of possible explanatory variables, the financial services industry is moving toward the use of new machine learning methods, such as neural networks, and away from older methods such as generalised linear models. However, their use is currently limited because they are seen as “black box” models, which gives predictions without justifications and which are therefore not understood and cannot be trusted. The goal of this dissertation is to expand on the theory and use of biplots to visualise the impact of the various input factors on the output of the machine learning black box. Biplots are used because they give an optimal two-dimensional representation of the data set on which the machine learning model is based.The biplot allows every point on the biplot plane to be converted back to the original ��-dimensions – in the same format as is used by the machine learning model. This allows the output of the model to be represented by colour coding each point on the biplot plane according to the output of an independently calibrated machine learning model. The interaction of the changing prediction probabilities – represented by the coloured output – in relation to the data points and the variable axes and category level points represented on the biplot, allows the machine learning model to be globally and locally interpreted. By visualing the models and their predictions, this dissertation aims to remove the stigma of calling non-linear models “black box” models and encourage their wider application in the financial services industry. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/31124 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:51.499Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Department of Statistical Sciences |
| publisherStr | Department of Statistical Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/31124 Unravelling black box machine learning methods using biplots Rowan, Adriaan Little, Francesca Lubbe, Sugnet Statistics Following the development of new mathematical techniques, the improvement of computer processing power and the increased availability of possible explanatory variables, the financial services industry is moving toward the use of new machine learning methods, such as neural networks, and away from older methods such as generalised linear models. However, their use is currently limited because they are seen as “black box” models, which gives predictions without justifications and which are therefore not understood and cannot be trusted. The goal of this dissertation is to expand on the theory and use of biplots to visualise the impact of the various input factors on the output of the machine learning black box. Biplots are used because they give an optimal two-dimensional representation of the data set on which the machine learning model is based.The biplot allows every point on the biplot plane to be converted back to the original ��-dimensions – in the same format as is used by the machine learning model. This allows the output of the model to be represented by colour coding each point on the biplot plane according to the output of an independently calibrated machine learning model. The interaction of the changing prediction probabilities – represented by the coloured output – in relation to the data points and the variable axes and category level points represented on the biplot, allows the machine learning model to be globally and locally interpreted. By visualing the models and their predictions, this dissertation aims to remove the stigma of calling non-linear models “black box” models and encourage their wider application in the financial services industry. 2020-02-14T12:04:32Z 2020-02-14T12:04:32Z 2019 2020-02-14T12:04:05Z Master Thesis Masters MSc http://hdl.handle.net/11427/31124 eng application/pdf Department of Statistical Sciences Faculty of Science |
| spellingShingle | Statistics Rowan, Adriaan Unravelling black box machine learning methods using biplots |
| thesis_degree_str | Master's |
| title | Unravelling black box machine learning methods using biplots |
| title_full | Unravelling black box machine learning methods using biplots |
| title_fullStr | Unravelling black box machine learning methods using biplots |
| title_full_unstemmed | Unravelling black box machine learning methods using biplots |
| title_short | Unravelling black box machine learning methods using biplots |
| title_sort | unravelling black box machine learning methods using biplots |
| topic | Statistics |
| url | http://hdl.handle.net/11427/31124 |
| work_keys_str_mv | AT rowanadriaan unravellingblackboxmachinelearningmethodsusingbiplots |