Cyber Essentials Certified

Mahes Visvalingam – Presentation


Data Rich – Information Poor

© Mahes Visvalingam, 2000


This is a record of a lecture by Mahes Visvalingam at IAP2000 on Friday October 20, 2000 at Trinity House (London).  IAP2000, the annual symposium of the UK Institution of Analysts & Programmers, was co-sponsored by the British Computer Society.  Symposium Programme

Please click on thumbnails.



ingots.jpg (3900 bytes) title-1.jpg (4373 bytes) preface2.jpg (7552 bytes) title-1.jpg (4373 bytes)

 Overview and Case Study

problem.jpg (3880 bytes)
data.jpg (3090 bytes)

Dichotomous Variables
Traditional Measures

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sally.jpg (1854 bytes)
howe.jpg (1181 bytes)  

      Signed chi-squares  

chi.jpg (1384 bytes)
uk-unemp.jpg (6368 bytes) chi-humber.jpg  8106 bytes)

emp.jpg (6518 bytes)
so.jpg (7757 bytes)

Practical outcomes and debatable assumptions

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current.jpg (7432 bytes) assumptions.jpg (7571 bytes)

Multi-category Data

Furnished Lets

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tenure-map.jpg (6961 bytes)


age-sex-ratio.jpg (7142 bytes)
age-sex-chi.jpg (6142 bytes) b-d.jpg (7053 bytes) e-f.jpg (6722 bytes)


summary.jpg (7050 bytes)

Acknowledgements & References

© Dr Mahes Visvalingam, Cartographic Information Systems Research Group,
University of Hull ,
University of Hull, 2000