Invited talk at BUET, organized by ACM BUET chapter.

1. VISUAL ANALYTICS
AWALIN SOPAN
@awalinsopan
Research Scientist, MicroStrategy Inc
ACM BUET Chapter
Department of Computer Science and Engineering,
BUET

2. Why visualize data?

3. Anscombe’s Quartet
1 2 3 4
x y x y x y x y
10.0 8.04 10.0 9.14 10.0 7.46 8.0 6.58
8.0 6.95 8.0 8.14 8.0 6.77 8.0 5.76
13.0 7.58 13.0 8.74 13.0 12.74 8.0 7.71
9.0 8.81 9.0 8.77 9.0 7.11 8.0 8.84
11.0 8.33 11.0 9.26 11.0 7.81 8.0 8.47
14.0 9.96 14.0 8.10 14.0 8.84 8.0 7.04
6.0 7.24 6.0 6.13 6.0 6.08 8.0 5.25
4.0 4.26 4.0 3.10 4.0 5.39 19.0 12.50
12.0 10.84 12.0 9.13 12.0 8.15 8.0 5.56
7.0 4.82 7.0 7.26 7.0 6.42 8.0 7.91
5.0 5.68 5.0 4.74 5.0 5.73 8.0 6.89

4. Anscombe’s Quartet
1 2 3 4
x y x y x y x y
10.0 8.04 10.0 9.14 10.0 7.46 8.0 6.58
8.0 6.95 8.0 8.14 8.0 6.77 8.0 5.76
13.0 7.58 13.0 8.74 13.0 12.74 8.0 7.71
9.0 8.81 9.0 8.77 9.0 7.11 8.0 8.84
11.0 8.33 11.0 9.26 11.0 7.81 8.0 8.47
14.0 9.96 14.0 8.10 14.0 8.84 8.0 7.04
6.0 7.24 6.0 6.13 6.0 6.08 8.0 5.25
4.0 4.26 4.0 3.10 4.0 5.39 19.0 12.50
12.0 10.84 12.0 9.13 12.0 8.15 8.0 5.56
7.0 4.82 7.0 7.26 7.0 6.42 8.0 7.91
5.0 5.68 5.0 4.74 5.0 5.73 8.0 6.89
Property Value
Mean of x 9.0
Variance of x 11.0
Mean of y 7.5
Linear regression y = 3 + 0.5x

5. Anscombe’s Quartet

6. Charts

7. Stock Market Price Trend

8. Marvel superhero network

9. Friend Network

11. Interactive Dashboard Dashboard
Hans RoslingStorytelling with Data

12. Visual Analytics:
-beyond numbers, static graphs and charts
 Use interactive visual interface
 See the overview
 Find pattern, trend, outlier, correlation
 Sort by rank, group similar things
 Make decision or ask more questions

14. Visual Mapping
 Size
 Shape
 Color
 Position
 Orientation
Attribute
value,
relation

15. Multivariate: scatter plot, bubble chart, parallel
coordinate, table
Relational: Network diagram (nodes and edges)
Temporal: Line chart
Geo-spatial: Map
Hierarchical: Tree, treemap
Part of whole: Pie chart
Data Types

17. Interaction
Sort
Filter
Drill down
Cluster

18. Tools
 MicrosStrategy
 Tableau
 SpotFire
 ManyEyes
 NodeXL
 Gephi
 D3: JavaScript library
Commercial tool for
Business data analysis

19. Information Visualization Mantra
Ben Shneiderman
Overview: see the big picture
Zoom and Filter: select only relevant data
Details on Demand: gain more details of the
selected data point

20. Projects

21. Distributions
-movie rating
-height/weight/mass
How can we compare rows of
distributions in limited screen
space?

22. Visual Representation

23. Visual Representation

24. Saves space, Enables stacking
Movie rating distributions
Each row a movie
From Height to Color

25. Jurassic park: uniform distribution Students vsTeachers

26. Online activity distribution
 Post
 Reply
 Invite
 Report
 Accept request
Each row = one
community’s
members’ activities
500+ communities
10k+ members

27. Community leaders’ network

28. Community Health Map

29. Conference Monitor

30. Twitter conversation

31. #Shahbag

32. Bridge node

34. G-Pare

35. Computer Science:
Algorithm, visual coding,
clustering, predication
alg, data structure
HCI/UX: Enhance user
experience, design
readable viz, make
meaningful navigation
Software engineering:
Enhance performance,
develop app,
dashboard, HTML, js,
java, iOS, openGL

36. Big data
More data (more rows)
Various types (more columns)

37. Challenge of Big Data Visualization
 Performance
 Understand the data
 Meaningful grouping
 Context
 Data quality
 Detecting outliers
 Consolidating various data sources
 Various platforms

38. Census:
https://www.census.gov/dataviz/
Census for STEM:
http://www.census.gov/dataviz/visualizations/stem/stem-html/
NY times:
http://www.nytimes.com/upshot/ Mostly analysis, but they also provide interactive viz
http://www.nytimes.com/interactive/2014/upshot/mapping-the-spread-of-drought-across-the-
us.html
Blogs:
http://datastori.es/
http://fellinlovewithdata.com/
Visualcomplexity
Flowing Data: http://flowingdata.com/
http://www.visualizing.org/
http://www.tableausoftware.com/public/gallery
List of tools: http://selection.datavisualization.ch/
Twitter visualizations: http://twitter.github.io/interactive/newyear2014/

39. Acknowledgement
BUET ACM Chapter
@awalinsopan