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COMP5048 Final Exam
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Question 1 (24 marks)
This section aims to assess your basic understanding of data structure and visualization.
There are many different data structures to store/represent various types of data. “ Arrays” and
“Graphs” are the commonly used data structures in Data Visualization.
An array usually consists of multiple data, each of which has multiple attributes. When a 2D array is
used, each datum corresponds to a row of the array and columns consist of attributes.
A graph consists of nodes and links which connect associated nodes. Edges may have directions
and their own attributes.
There are many different visualization methods that have been developed and some names of those
visualization methods are listed below:
· Histogram
· Parallel Coordinate Plot
· Area graph
· Heat map
· Force Directed Graph
· TreeMap
Your task is to assign each of these six visualization methods to either the “Array” or the “Graph”
group to indicate which data structure is most suited for that particular visualization.
Once you assign each visualization method to one of two groups, provide a sketch to depict a typical
appearance of those six types of visualization and explain what sort of visual variables can typically
24/06/2021 COMP5048 Final Exam (main)
be used in each visualization, and also explain what type(s) of analysis(analyses) each visualization
is suited to.
For each visualization, provide
*) Suited Data Structure (Array or Graph)
*) Image (sketch)
*) Typical visual Variable(s) used,
*) Typical Analysis type(s) suited for the visualization
Question 2 (20 marks)
Q2-a (8 marks)
There are a number of ways to visually represent complex data. As a part of the visualization
pipeline, each domain in the data needs to be mapped onto one of the visual variables. An
appropriate visual variable needs to be carefully selected depending on the type of data. In the
lecture, we have discussed the following data types:
Categorical
Ordinal
Interval
Ratio
Your task is to write a brief description for these four data types and give one example of data for
each data type.
Q2-b (12 marks)
In the lecture, we also discussed various visual variables (also called retinal variables). The following
are some of those visual variables:
Size
Color Hue
Color Value
Color Intensity
Texture
Shape
Each visual variable is suited to represent certain data types (listed in Q2-a). The task for Question
2-b is to indicate which data type would be best to use each of these six visual variables. There
24/06/2021 COMP5048 Final Exam (main)
might be more than one data types one visual variable can accurately represent. For each visual
variable, list appropriate data type(s) to represent and explain why each visual variable is suitable to
represent the nominated data type(s).