Lecture 6

Question 1

Types of basic charts

Answer 1

• bar charts
• line chart
• pie chart
• scatter plot
• heat map
• highlight table
• bubble chart
• tree map

Question 2

Types of advanced charts

Answer 2

• histogram
• shared axis chart
• combo chart (dual axis)
• bullet chart
  donut chart
• unit chart
• box and whisker chart
• waterfall chart

Question 3

bar charts

Answer 3

bar charts represent numeric values as bars

- very effective for comparing magnitudes and spotting highs and lows in the data

Question 4

line chart

Answer 4

• represents trends over time
• requires numeric values plotted as lines
  over dated related field

Question 5

pie chart

Answer 5

• best at showing part to whole relationships when there arent too many slices
• does not give the viewer a way to quickly and accurately compare info

Question 6

scatter plot

Answer 6

• a collection of scattered points
• allows us to see the relationship between two variables, and are great for visualizing clusters, showing possible correlations and spotting outliers

Question 7

heat maps

Answer 7

• display information using a matrix of colors
• the density of the colour represent the concentration of information or the relative magnitude of the values
• great for spotting patterns
  e. g sales quota assessment

Question 8

bubble charts

Answer 8

• presents data using circles of different sizes and colors
• a larger or darker circle represent items with higher values
• used to show the relationship between three or more measures

Question 9

highlight tables

Answer 9

• represents tabular info in a color coded grid
• the background cell corresponds to the relative magnitude of the value it represents
• great when displaying the actual numeric values

Question 10

treemaps

Answer 10

• represent part to whole and hierarchical relationships using a series of rectangles.
• sizes and colors of rectangles will vary based on the values they represent
• larger rectangles or concentrated coloured rectangles depict the highest values

Question 11

histogram

Answer 11

• graphs that plot frequency distribution of data

- similar to bar chart, this one groups numbers into ranges

Question 12

shared axis chart

Answer 12

• chart that shares one axis among multiple measures

- can be used when the measures have similarly ranged values and can be presented using one mark and one scale

Question 13

combo chart (dual axis)

Answer 13

• uses two axis for two different measures

- useful when two measures have different types or ranges or if the two measures need to be displayed differently

Question 14

bullet chart

Answer 14

• chart borrows from thermometers and progress bars, typically used to show goals vs actuals
• allows us to visualize progress in a small, concise graph

Question 15

Unit charts (pictogram charts)

Answer 15

• display each unit of measure as a single mark or symbol

- create more engagement because of the images and visuals used

Question 16

donut chart

Answer 16

similar to a pie chart but has a hole in the middle

Question 17

box and whisker (box plots)

Answer 17

• charts that divide their data points

- great for comparing distributions of data for different group or categories side by side

Question 18

waterfall chart

Answer 18

• looks like bar charts, specifically show the aggregated effect of a series of positive and negative values
• final bar represents the net value of all the preceding values
• useful when the history as well as the final net value is important

Question 19

Characteristics of good visualization

Answer 19

Novel
informative
efficient
aesthetic

Question 20

Social Network Visualizer

Answer 20

• Pajek - used for analysis and visualization of large networks containing up to one billion vertices
• Gephi is usually a graph exploration and manipulation software written in java
• NodeXL
• GraphStream
• networkit
  -UNISoN
  SocioViz

Question 21

Gestalt principles of visual perception

Answer 21

• a psychological theory of perception that suggests the mind understands external stimuli as whole rather than the sum of their parts
• the wholes are structured and organized using grouping laws

Question 22

principles of visual perception

Answer 22

• proximity
• similarity
• enclosure - perceive objects as belonging together when they are enclosed in a way it appears to create a boundary around them
• closure - we perceive open, incomplete and unusual forms as closed, whole, and regular
• continuity - perceive objects belonging together if they appear to be a continuation of one another
• connectedness - perceive objects that are connected as part of the same group