Data Exploration and Visualization
Content
- The Role of Visualization in Big Data Analytics
- Visualization: Best Practices
- Tools and Techniques
- The MovieLens Dataset and Exercises
The Role of Visualization
The main purpose is to display information in a way that is meaningful.
Raw Data
Data Processing
Cleaned Data
Exploratory Data Analysis
Models and Algorithms
Decisions / Insights
Challenges
Does the data fit into memory?
Scale
Does the data fit into memory?
Static vs Dynamic
Does the data fit into memory?
Variable Quality
Types of Visualizations
Information Visualization
Scientific Visualization
Geographical Visualization
(or visualization basics)
Best Practices
Choose the right visual!
Data-to-ink-ratio
The Gestalt Principles of Perception
1. Similarity
2. Proximity
3. Closure
4. Continuation
Watch out for Pie Charts!
"The only thing worse than a pie chart is several of them."
Edward Tufte, Statistican and Artist
