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Unformatted text preview: iTrang
Chapter 2 (continued) Data Visualization  Picturing Varia What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Directed versus Exploratory Approaches
“Do you see what I see?” Directed Analysis begins with a speciﬁc question that you wish to answer,
then proceed a search for the data that may result in ﬁnding the answer. Exploratory Analysis begins by looking at the data w.o predetermining
what you expect to ﬁnd, then proceed to noticing things in the data that
are interesting and asking a question about it, then proceed in the
directed path in search of the Le
answer.
DaiTrang
Chapter 2 (continued) Data Visualization  Picturing Varia What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Directed versus Exploratory Approaches
“Do you see what I see?” Directed Analysis begins with a speciﬁc question that you wish to answer,
then proceed a search for the data that may result in ﬁnding the answer. Exploratory Analysis begins by looking at the data w.o predetermining
what you expect to ﬁnd, then proceed to noticing things in the data that
are interesting and asking a question about it, then proceed in the
directed path in search of the Le
answer.
DaiTrang
Chapter 2 (continued) Data Visualization  Picturing Varia What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Directed versus Exploratory Analysis
“Do you see what I see?” Which approach is vital for data analysis?
A. Directed Approach
B. Exploratory Approach DaiTrang Le Chapter 2 (continued) Data Visualization  Picturing Varia What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Answer to
Both approaches are vital for data analysis? A. Directed Approach andChapter 2Exploratory Approach Picturing Varia
– B. (continued) Data Visualization
DaiTrang Le What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Why both approaches are important?
Data analysis, like experimentation, must be considered as an
openminded, highly interactive, iterative process ... of
possible options (Jonh Tukey)’
Comprehensive analysis requires that we sometimes start with
a blank slate and let the data itself direct you to items worth
examining.
At the start, we may know very little. The goal is to get to
where we need to be: understanding much. It may take many
steps and many roads.
It pays oﬀ, ... suddently you begin to see... DaiTrang Le Chapter 2 (continued) Data Visualization  Picturing Varia What is Data Visualization?
Displaying Categorical Data
Displaying Categorical Data
Describing Numerical Data
Misleading Graphs Interpreting Graphs
Review Chapter 2 Why both appro...
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 Spring '14

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