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Harvard IACSCS109APavlos Protopapas, Kevin Rader, and Chris Tanner
A vehicle for EDA and communication
Lecture 14: Visualization
As the matplotlib thickens …
CS109A, PROTOPAPAS, RADER, TANNER 3
• Homework 3 is due Oct 7 (Wed) @ 11:59pm
• Didn’t submit Milestone 1? Want to change project selection?E-mail the helpline at [email protected]
• After lecture, please update your Zoom to the latest version (5.3.1).
ANNOUNCEMENTS
• Understand why visualization/plotting is important
• Learn aspects that tend to make visualizes effective and ineffective
• Feel comfortable designing plots that best convey your message
• Gain experience in producing plots with Python
4
Learning Objectives
be more cognizant of broader design choices(e.g., typography, s p a c i n g , colors) Extra Goal
5
Agenda
CommunicationMotivation
Key Considerations
EDA Refresher
Effective VisualizationGraphical Integrity
Scope
Displays
Sensible Design
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Agenda
CommunicationMotivation
Key Considerations
EDA Refresher
Effective VisualizationGraphical Integrity
Scope
Displays
Sensible Design
Assume you know a given dataset is credible,
complete with the info you want, and has no missing values.
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Why do further EDA?
Purposes of EDA:• Maximize insight into a dataset
• Uncover underlying structure
• Detect outliers
• Test underlying assumptions
• Develop parsimonious models
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CS109A, PROTOPAPAS, RADER, TANNER 9
EDA Refresher: English Premier League
name club age position market value
Alexis Sanchez
Mesut Ozil
Petr Cech
Theo Walcott
Laurent Koscielny
Arsenal
Arsenal
Arsenal
Arsenal
Arsenal
28
28
35
28
31
LW
AM
GK
RW
CB
65
50
7
20
22
from www.transfermarkt.us
CS109A, PROTOPAPAS, RADER, TANNER 10
EDA Refresher: English Premier League
CS109A, PROTOPAPAS, RADER, TANNER 11
EDA Refresher: English Premier League
CS109A, PROTOPAPAS, RADER, TANNER 12
EDA Refresher: English Premier League
Are the outliers legit?
CS109A, PROTOPAPAS, RADER, TANNER 13
EDA Refresher: English Premier League
CS109A, PROTOPAPAS, RADER, TANNER 14
EDA Refresher: English Premier League
CS109A, PROTOPAPAS, RADER, TANNER 15
EDA Refresher: English Premier League
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Agenda
CommunicationMotivation
Key Considerations
EDA Refresher
Effective VisualizationGraphical Integrity
Scope
Displays
Sensible Design
DISCLAIMER. Some of these examples involve political data. In no way should this be taken as a signal of my support or endorsement in any beliefs; the point is merely to convey good and bad choices when it comes to effective visualization.
17
Agenda
CommunicationMotivation
Key Considerations
EDA Refresher
Effective VisualizationGraphical Integrity
Scope
Displays
Sensible Design
DISCLAIMER. Some of these examples involve political data. In no way should this be taken as a signal of my support or endorsement in any beliefs; the point is merely to convey good and bad choices when it comes to effective visualization.
18
Agenda
CommunicationMotivation
Key Considerations
EDA Refresher
Effective VisualizationGraphical Integrity
Scope
Displays
Sensible Design
DISCLAIMER. Some of these examples involve political data. In no way should this be taken as a signal of my support or endorsement in any beliefs; the point is merely to convey good and bad choices when it comes to effective visualization.
