turning questions into answers with tableau...turning questions into answers with tableau ross...
TRANSCRIPT
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Turning Questions into Answers with Tableau
Ross Bunker
Principal Engineer
Tableau Software
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Helping People Seeand Understand Their Data
Tableau’s Mission
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Understand: Perceive the significance, explanation, or cause of
Oxford English Dictionary
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Overview
Anatomy of a Question
Answering Questions using Tableau
Summary and Future
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Anatomy of a Question
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Anatomy of a Question
Warning! Grammar ahead….
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Anatomy of a Question
‘Things’ the question is about
“What were the bestselling cars of 1990?”
‘Attributes’ of ‘things’
“What types of cars sold best in 1990?”
Sometimes a placeholder for the verb
“What happened to car sales in 1990?”
Also ‘which’
“Which cars sold best in 1990?”
WHAT
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Anatomy of a Question
Semantically a person
In terms of data, just another ‘What’
(But semantics are definitely interesting)WHO
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Anatomy of a Question
Time-series => use a timeline
When did things happen?
“When did sales increase?”
Prediction
“When will sales level off?”
Requires inference, i.e. forecasting or modelling
Time-series is not always indicated by when
“In what year did the most cars sell?”
WHEN
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Anatomy of a Question
Location analysis
“Where are my sales the strongest?”
Not always a map
“Where do I sell the most staplers?”
Geo-spatial needed for locality questions
“Does proximity to California affect delivery times?”
Spatial is not always indicated by where
(as above)
“What states had the highest sales?”
WHERE
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Anatomy of a Question
Causation inference
This what people are for!
aka Job SecurityWHY
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Anatomy of a Question
Causal versions are like ‘Why’
“How come my profits went down?”
Quantity, magnitude, frequency
“How many staplers did we sell last year?
“How far do my customers live from my stores?”
“How long between ordering and delivery?”
“How often do my stores run out of supplies?”
Focus shifts to the rest of the question
“sell”, “live”, “between”, “run out”
HOW
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Anatomy of a Question
Introductory words aren’t much help
Same question can be asked with different introductory words
“Where were car sales the highest?”
“What states had the highest car sales?”
Focus on nouns, verbs and clauses
WHAT
WHO
WHEN
WHERE
WHY
HOW
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Anatomy of a Question
Often defines or points to the measurement
Action to measure“How many cars were purchased last month?”
Or measure is the subject/object of the verb“How did sales do this past year?”
Comparison“How does marketing spend affect sales?”
“How did this month’s sales compare to last month’s”
“Which products sold better/worse this month?”
Change“How many salaries went up/down this year?”
“When did sales start to rise?”
“How long after purchase do cars lose the most value?”
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Dimensions in your question
“How many cars sold in each state?”
Not just the subject of the question
“Which employees sold the most cars in each city?”
Sometimes implicit with the verb
“What were sales like last year?”
“What were home sales like last year?”
Anatomy of a Question
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Anatomy of a Question
Domain—values from the data
“Washington”, “Seattle”, “Europe”
“Stapler”, “Ford”,
“Large”, “Blue”, “Female”
“August 27, 1995”, “3:00p”
Often preceded by keywords
“in” <place>
“on” <date>
“among” <choices>
Sometimes qualify the dimension
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Adjectives“How many customers made their first order lastyear?”
“How did blue cars sell in the year 1990?”
Superlatives “What was the bestselling car this year?”
“Which cars sold the most in each state?”
Qualifiers “that”, “who”, “which”, “in”
“For customers that bought staplers, how many also bought chairs?”
Anatomy of a Question
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Anatomy of a Question
Relative clauses
Important information about nouns
“Which customers who bought staplersalso bought chairs?”
May be used with or without comma
“Of the cars sold last year, how many were bought by someone who also bought a car the year before?”
Uncle
Ted
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Anatomy of a Question (cont’d)
Special Comparisons
Change over time“How did sales this year compare to last year?”
Spatial analysis“How do employee costs relate to urban areas?”
Part/Whole“How does each state’s sales compare to the average for all states?”
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Answering a Question with Tableau
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2 Cars
4 Kids
2 Adults
3 Drivers
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will thefamily Tesla arrive?When
Who?What?
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Choosing your data
Step 1: Identify ‘things’ and ‘attributes’
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Choosing your data
Step 1: Identify ‘things’ and ‘attributes’
Step 2: What are you measuring?
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Choosing your data
Step 1: Identify ‘things’ and ‘attributes’
Step 2: What are you measuring?
Step 3: Identify your data
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Interlude:
LOD and your DataSource
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Interlude:
Target audience
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Process
1. Identify the verbs and nouns that indicate what you want to measure
2. Figure out the other nouns in your question and find the fields for them
3. If you have any qualifiers or relative clauses, build filters to reflect themUse Sets or LOD calculations for relative clauses in many cases
4. Map analytical style to appropriate Tableau featuresMaps for showing spatial proximity
Timeline for time based questions
Sorting for superlatives/comparison
Totals and Reference Lines for part/whole
Table Calculations for comparison over time or part/whole
5. Augment an audience targeted dashboard with appropriate featuresConsider filter controls, parameters and actions to allow users to customize the question
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Mapping to Features
Aggregation X X
Sorting X X
Filters X X X X
Sets/LOD/Context X X X X
Table Calculations X X
Maps X
Totals/Ref Lines X X
Parameters, Actions, Filter Controls
X X X X X
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The Future
Natural Language ProcessingAutomatically build vizzes from questions
Customize vizzes using natural language
Richer Semantic ModelBeyond Geography: Dollars, URLs, Customer
Allow customization
Richer Data ModelUnderstand context of measurements
Express more questions with a single datasource
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Top of the Table | Winning with table calcsThu | 10:45a – 1:15p | L2 – 208
As good as it setsWed | 1:45p – 4:15p | L2 – 294
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Please complete the
session survey from the My
Evaluations menu
in your TC18 app
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