Data 101: Introduction to Data Visualization
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Transcript of Data 101: Introduction to Data Visualization
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Data VisualizationData 101May 10th, 2016
Data 101. David Newbury — @workergnome 1
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David NewburyProfessional nerd artist
@workergnomewww.workergnome.com
Data 101. David Newbury — @workergnome 2
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What We're Doing Today:
—(Brief) History of Data Visualization—(Tiny) Theory of Visualization—(Nerdy) Overview of Concepts—(Fake) Data Exploration—(Incomplete) Overview of Tools
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What We're not Doing Today:
—Writing Code—Thinking about Mapping—Worrying about Data Provenance
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Which is biggest?
15012, 8271, 30193, 1189, 9913, 16000, 92481, 49801, 100407, 2910, 3809, 8018, 61528, 18083, 38691, 1800
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Which is biggest?
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Which is biggest?
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Why?Data 101. David Newbury — @workergnome 8
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(Brief)History ofData Visualization
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Tabula Peutingeriana, 5th century CE
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Rene Descartes, 1600s
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Joseph Priestly, New Chart of History (1769)
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William Playfair, (1786 & 1801)
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John Snow, London Cholera Map (1854)
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Cholera Map
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Florence Nightingale, War Deaths (1855)
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Charles Minard, March on Moscow (1862)
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More recent history.
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Edward Tufte
The Visual Display of Quantitative Information.
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New York Times
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(tiny)
Theory of Visualization
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Dataviz is constructed reality.You are telling a story, not (just) stating facts.
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data artas opposed to
data visualization
as opposed to
statistical graphicsData 101. David Newbury — @workergnome 29
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StatisticalGraphicsHow do I create Statistical Graphs in SAS 9.1.3 without Proc Gplot. UCLA: Statistical Consulting Group.http://www.ats.ucla.edu/stat/sas/notes2/Data 101. David Newbury — @workergnome 30
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Data Art
Dear Data Giorgia Lupi & Stefanie Posavec.http://www.dear-data.com
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Two Uses1). help people grasp things outside their reach
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Two Uses1). help people grasp things outside their reach
2.) tell stories
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explanatory visualization work
as opposed to
exploratory visualizations
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Dataviz is constructed reality.Do you care how true your story is?
Do you care how accurate your story is?
Are you trying to teach, entertain, or convince?
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(Nerdy)Overview of Concepts
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What can you visualise?
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Potential Subjects.
subways, sheep, the solar system,shoes, sleep, skyline,snow, supermarket, sausages,school,the sea, spiders,staircases, syrup, soap,sawmills, stereos...
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Potential Subjects.
subways, sheep, the solar system,shoes, sleep, skyline,snow, supermarket, sausages,school,the sea, spiders,staircases, syrup, soap,sawmills, stereos...
...and other things that begin with S.
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Dimension and Scopeare about choosing what to focus on.
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Scope
Out of the infinite stories about any subject, which parts are you going to choose?
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Possible Scopes
All trains in a dayAll the rides that I've been on this yearMy train this morningAll of the stops in the cityEach lineEvery train stop in the past 50 years
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Dimension
Which bits of information about a subjectare you going to focus on?
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Possible Dimensions
number of carsduration of ridedate of a ridedifferent linesnumber of stopscost per ridenumber of stops per daytime between stopsData 101. David Newbury — @workergnome 48
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What does yourdata look like?
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Types of Data
DatesNumbersGeo CoordinateStringsCategories
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Types of Data
number of cars - Numericduration of ride - Numericdate of a ride - Datedifferent lines - Categorynumber of stops - Numericcost per ride - Categorynumber of stops per day - Numerictime between stops - NumericData 101. David Newbury — @workergnome 51
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Two (related ides):
Categories & measures
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Categories are Discrete Things
Measures are for Counting
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number of cars - Measureduration of ride - Measuredate of a ride - Measuredifferent lines - Categoriesnumber of stops - Measurecost per ride - Categoriesnumber of stops per day - Measuretime between stops - Measurecleanliness - Categories
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A hidden dimension:
David, Daniel, Dawn, Danique
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A hidden dimension:
David (1), Daniel (2), Dawn (3), Danique (4)
Position of the item in the group.
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(Fake)Data Exploration
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TRY IT.Data 101. David Newbury — @workergnome 58
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Choose one.
subways, sheep, the solar system,shoes, sleep, skyline,snow, supermarket, sausages,school,the sea, spiders,staircases, syrup, soap,sawmills, stereos...
...and other things that begin with S.
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NowWhat?
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We need to map our datafrom a domainto a range.
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Domain
number of cars - 1...8duration of ride - 30 sec...2 hoursdate of a ride - - 24ft...200ftdifferent lines - Red line, Blue line, Green line, Silver Line, Yellow Linenumber of stops - **2..20cost per ride - "$2.50, $1.75, $3.00, $0.00"number of stops per day - ??...???Data 101. David Newbury — @workergnome 62
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Range
Domain is the possible input values
Range is the possible output values
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Data3, 7, 10, 6, 2Position of the item in the group.
Domain[0-10][1-5]
RangeX: 400px Y: 800px
MappingX: item position Y: numeric value Data 101. David Newbury — @workergnome 64
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Data3, 7, 10, 6, 2Position of the item in the group.
AreaData 101. David Newbury — @workergnome 65
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Data3, 7, 10, 6, 2Position of the item in the group.
ColorData 101. David Newbury — @workergnome 66
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Data3, 7, 10, 6, 2Position of the item in the group.
MultiplesDimensions
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Dataval1: 3, 7, 10, 6, 2val2: 5, 8, 1, 8, 3val3: Cat, Dog, Cat, Cat, DogPosition of the item in the group.
MappingX: item position Y: val1 Size: val2 Color: val3
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Dimensions beyond X and Y.
ColorSizeShapeLabelsPatternsIconsAnything Else You Can Imagine
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TRY IT.Data 101. David Newbury — @workergnome 70
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FinishingTouches
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Measures get AxisCategories get Headers
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Labels
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Axis
Category AxisNumber AxisDate AxisLog axis
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Legends
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TRY IT.Data 101. David Newbury — @workergnome 76
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Review
DimensionsScope
DomainRange
CategoriesMeasures
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(Incomplete)
Overview of Tools
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Thank You.
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