1. Lecture 02

2. Recap
Data Visualization
Data Related Terms

3. Outline Need of data visualization Importance of data visualization
Limitations of Spreadsheet
Interpretation through data visualization
Interactive Visualization

4. Need for data visualization
Big data
Broad term for data
Powerful tool for seeking insights
large and complex
90% data has been generated in last two years
2.5 billion GB is generating everyday
Data generated in 2015 by 1 trillion connected devices and objects

5. How are you going to make sense of all that information efficiently so you can make a good decision?

6. Data Visualization

7. Importance of Data Visualization
well designed data graphics
method of consolidating data into one collective, illustrative graphic
patterns can be spotted very easily when data volumes are very large
expose something new about the underlying patterns and relationships contained within the data
key to good decision

8. Limitations of Spreadsheet
electronic spreadsheet cannot visually represent the information due to data presentation limitations
spreadsheets would be a humongous pile of paper if printed out
would spend hours searching among thousands of rows and columns of data

9. Interpretation through Data Visualization
Present the data in a way that saves time and energy
Interactive charts and graphs makes easier to
identify areas that need attention or improvement
understand what factors influence design system
predict how to change system design accordingly
predict the efficiency of system

10. Interactive Visualization
A step further to data visualization
humans interact with computers to create graphic illustrations of information
how this process can be made more efficient
Two criteria
Human input
control of some aspect of the visual representation of information, or of the information being represented, must be available to a human
Response time
changes made by the human must be incorporated into the visualization in a timely manner

11. Conclusion

12. End