Lesson 1
Introduction to Visual Analytics
Mentor: Dr. Kam Tin Seong
Associate Professor of Information Systems (Practice)
tskam@smu.edu.sg
Version 1.8.0
Last updated: 30/8/2018

ISSS608 Visual Analytics and Applications
What will you learn from this lesson?
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Motivation of Visual Analytics
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What Visual Analytics is
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The value of Visual Analytics
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Visual Analytics Toolkits
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Visualising and Analysing Univariate Data

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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The First Crime of Data Visualisation

Source: MINISTRY OF TRADE AND INDUSTRY
STRAITS TIMES GRAPHICS

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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Data rich, information poor


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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The impact of volunteered data


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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The impact of data.gov initiative


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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The impact of smart nation vision


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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Everyday data analysts
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Non-professional statistician
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Uses spreadsheet as main analytical tool
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ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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Excel table : great hammer, lousy screwdriver


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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Charts should work with you, not against you


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
Data analysis
without
data visualisation
is no
data analysis

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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When statistics failed!


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Motivation of Visual Analytics
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Analytical graphics reveal the truth


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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The science of analytical reasoning facilitated by interactive visual interfaces
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A halfway house: a stopping place on the path from data to decision

Detecting the expected,
discovering the unexpected

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Visual Analytics’ greatest strength is its use for sense-making

When you have eliminated the impossible, whatever remains, however improbable, must be the truth
- Sherlock Holmes

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Visual Analytics Framework


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Conceptual view of Visual Analytics


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Visual presentation using Excel chart


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Visual exploration using JMP chart


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
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Visual Analytics as a knowledge discovery process


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
What is Visual Analytics?
-
The science of Visual Analytics


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
The value of Visual Analytics
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Florence Nightingale (12 May 1820 – 13 August 1910)


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
The value of Visual Analytics
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The source of cholera outbreak in Soho, England. (John Snow, 1854).


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Visual Analytics toolkits
- Commercial-off-the-shelf
- Stand alone
- Data visualisation developer toolkits
- Open-source
- Stand alone
- Data visualisation API library

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Visual Analytics toolkits
- Commercial-off-the-shelf





ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics

Visual Analytics toolkits
- Introducing Tableau




ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Visual Analytics toolkits
- Tableau platforms

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics

Visualisng and Analysing Univariate Data
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Distribution analysis
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Part-to-whole
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Statistical distribution
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Deviation analysis

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Visualisng and Analysing Univariate Data
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Characteristics of univariate data
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Categorical
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Continuous
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ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of categorical data
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Save the Pies for Dessert
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Pie charts force us to compare either 2-D areas formed by each slice or the angles formed by each where the slices meet in the centre
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Segment too small to be labelled
-


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of categorical data
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Bar chart came to the rescue


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of categorical data
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Pareto chart


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of continuous data
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Beyond single descriptive statistic



ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of continuous data
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Introducing Boxplot


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of continuous data
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Interpretation of a Boxplot


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Distribution analysis of continuous data
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Comparing multiple boxplot


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Deviation Analysis


- Examining how one or more sets of values deviate from a reference set of values

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Deviation Analysis


- A Tale of Deviation Charts

ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Deviation Analysis
- Working with reference line



ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
Deviation Analysis
- Working with reference region


ISSS608 Visual Analytics and Applications
Lesson1: Introduction to Visual Analytics
ISSS608-Lesson01
By Kam Tin Seong
ISSS608-Lesson01
This lesson introduces Visual Analytics. It consists of four section. First, the motivation of visual analytics will be explained. This is followed by a discussion on the key features of visual analytics. In this third section, the historical development of visual analytics will be discussed. Lastly, we will examine graphical techniques for visualising and analysing univariate data.
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