NARRATIVE + EXPLORATION Infoviz class: Cal v. Stanford Drought
and Wildfires in California
Slide 15
Slide 16
Reed, Swigert, & Malina
Slide 17
Slide 18
Slide 19
Slide 20
BIOSCIENCE IS RICH IN VISUALIZATIONS Find them at
biosearch.berkeley.edu
Slide 21
Query on miRNA at biosearc.berkeley.edu
Slide 22
Slide 23
WHAT IS EXPLORATORY DATA ANALYSIS?
Slide 24
What is Exploratory Data Analysis? looking at data to see what
it seems to say Tukey the first step before confirmatory techniques
getting to know the lay of the land detective work
Slide 25
Why do we do EDA? Optimize a function Create a narrative, tell
a story Plan a strategy Monitor a situation Look for causal
relationships Solve a crime
Slide 26
What do we do when we do EDA? Overviews Get to know the data:
tendencies, trends Make discoveries Find anomolies / outliers /
errors Formulate hypotheses Support / refute / confirm them
Slide 27
EDA Assignment Readings: Steve Fews book Now You See It Steve
Few on Exploratory Vistas Al Inselberg on Multidimensional Data
Detective Polaris paper (foundations of Tableau) Short Tukey paper
on EDA Tableau Videos Demonstrations of Tableau on a data set for
something we did in class Practice Assignment Study EDA assignments
by 2 other students Write paragraphs about each Instructor
commented on these Redirected students who were not on the right
path
Slide 28
EDA Assignment Assignment: Select data set Formulate hypotheses
Explore those hypotheses; let the data determine next steps Verify
or refute hypotheses; reformulate or formulate new ones Create
dashboards summarizing the results for each.
Slide 29
EDA ASSIGNMENT Faye Ip on BART Strike
Slide 30
QUESTION #1 Do union workers make more money than non-union
workers? (Answer: no)
Slide 31
Slide 32
QUESTION #2 Is BART management-heavy? (Answer: no)
Slide 33
Slide 34
QUESTION #3 Do union workers earn a lot of overtime pay?
(Answer: no, except for transportation operations, but they have
low base pay. However there are some interesting outliers amount
the non-union workers...)
Slide 35
Slide 36
QUESTION #4 What is going on in the Finance Department? (Answer
something suspicious! Roberta Collier base pay $33,971, other pay
$289,534)
Slide 37
Slide 38
Slide 39
EDA TOOL COMPARISON Saraiya, North, & Duca. "An evaluation
of microarray visualization tools for biological insight.Infoviz
2004.