Abstract
Establishes, by considering a variety of activities, the issues that must be addressed in order to understand and make effective use of visualization. It ends with the proposal of a model of the visualization process whose major components are Representation, Presentation and Interaction.
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Notes
- 1.
The median is much more useful than the mean, because one false data observation can seriously throw off the mean, whereas the median is not affected until half the data observations are false. In other words, the median is a much more robust measure.
- 2.
Also referred to as a cognitive map (Tversky 1993).
- 3.
The concept of sensitivity has very wide relevance, and will be a recurring theme of this book.
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Exercises
Exercises
2.1.1 Exercise 2.1
What are the drawbacks and advantages of the bargram representation of data?
2.1.2 Exercise 2.2
A car is described by a number of attributes: price, appearance, make, recommendations, horse-power, year of manufacture and age. Say which of these attributes are numerical, ordinal or categorical.
2.1.3 Exercise 2.3
Based on your experience of buying a mobile phone, washing machine, bicycle, car or other multi-attribute object, express your view as to the meaning of the term ‘overview’ and ‘detail’ and give some examples.
2.1.4 Exercise 2.4
For which of the attributes mentioned in Exercise 2.2 would it be possible to order the objects above the corresponding bar of a bargram?
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Spence, R. (2014). Issues. In: Information Visualization. Springer, Cham. https://doi.org/10.1007/978-3-319-07341-5_2
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DOI: https://doi.org/10.1007/978-3-319-07341-5_2
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