visualization 101 ba4all

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VISUALIZATION 101USING VISUALIZATION TECHNIQUES FOR

DISCOVERY AND DISPLAY

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“ALL TRUTHS ARE EASY TO UNDERSTAND ONCE THEY ARE DISCOVERED;

THE POINT IS TO DISCOVER THEM.”

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Between 70% and 80% of Business Intelligence projects end in failure

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Seventy-five percent of BI success is determined by factors other than data and technology – so you need to know how to communicate your BI content effectively (Center for Information Based Competition)

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Effectively visualizing your KPIs is critical, as 70% of the sense receptors in the human body reside in our eyes

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Visualizations…

…TO DIRECT

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… to Inform

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… to Educate

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… to Discover

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…TO KEEP TRACK OF PROGRESS

Source: http://robslink.com/SAS/democd63/sfew_dashboard2.htm

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Visualization is…• Based on (non-visual) data• Primarily producing an image• Readable and recognizableRobert Kosara, www.eagereyes.org

The conversion of any abstract data into a graphical format so the characteristics and relationships of the data can be explored and analyzed.

Mark Madsen, Third Nature

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Above all else show the dataEdward Tufte, 1983

Source: http://www.infovis-wiki.net/index.php/Data-Ink_Ratio

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Data-Ink Ratio

Source: http://www.infovis-wiki.net/index.php/Data-Ink_Ratio

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Chartjunk or Art?

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GeWhat? Gestalt principles!

P R O X I M I T Y

CAREFUL: • don’t force the reader to see

groups that aren’t really there• a simple shape is not necessarily

the right shape.

“describe how the mind organizes visual data”

COLORCLOSURE

/ENCLOSURE

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Beware of your Brain

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How many 5’s?

Source: Stephen Few, Show me the Numbers

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Again, how many 5’s?

Source: Stephen Few, Show me the Numbers

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http://www.visual-literacy.org/periodic_table/periodic_table.html

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The first Bar Chart (1786!)

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… and Pie Charts

William Playfair, 1801

Florence Nightingale, 1826

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Be Careful with Pie Charts…

Total = 100%<=5 categoriesPart to wholeRough indication

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And Never, EVER, use 3D!

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What goes where?

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The ‘Standard’ Stuff

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But what about…

Bullet Graphs

Spark Lines

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Newer Visualization types

Horizon Graphs

(Mari-)Mekko Charts

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Visualization is about Patterns

Course grained patterns (Table Lens)

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Patterns in CategoriesParallel Sets

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Patterns of Structure

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Patterns of Containment

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Patterns of Connection

www.circos.ca

www.circos.ca

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Patterns in Time

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Maps show the ‘where’

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Choropleth Maps

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Symbol Maps

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Combine: Small Multiples

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Required Reading

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Guidelines & Conclusions

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Jos van DongenIn BI & DWH since 1991Principal Consultant @ SAS NetherlandsAuthor/Speaker/Analyst

Web: www.sas.com/netherlandsEmail: jos.vandongen<at>sas.comPhone: +31-(0)6-10172008LinkedIn: jvdongenTwitter: josvandongenIRC: _grumpy