Visual Display of Quantitative Informationcosc.canterbury.ac.nz › teaching › 4thyear › 2013...
Transcript of Visual Display of Quantitative Informationcosc.canterbury.ac.nz › teaching › 4thyear › 2013...
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Visual Display of Quantitative Information 1
Visual Display of Quantitative Information
Neville Churcher(Thanks to Andy Cockburn)
Department of Computer Science & Software EngineeringUniversity of Canterbury
2013
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Visual Display of Quantitative Information 2
Why?
P Explore dataP Reveal information in data (distribution, relationships, . . .P Make a pointP Illustrate an ideaP Give an exampleP Condense informationP Provide interestP . . .4 > 1 of the above
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Considerations
P Big picture (focus + context)P SizeP LocationP Title, captionP UncertaintiesP OriginP ScaleP OutliersP LabelsP Significant figuresP Artifacts (avoid bitmaps, . . . )P Avoid misleading
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Example
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Example
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Example
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Example
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Example
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Tables
P Good for showing exact (numeric) valuesP Multiple local comparisons practicableP Supplement text explanationP Not so good for trendsP Left-justify textP Right-justify numbers (align decimal points)P Significant figures
P Avoid data prisons (too many grid bars)P Unnecessary for few data values—minimum viable size?
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Example
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For further ideas . . .
P Books by Tufte e.g. The Visual Display of QuantitativeInformation
P http://www.datavis.ca/gallery
P http://www.informationisbeautiful.net
P http://memebase.cheezburger.com/graphjam
P COSC415P . . .
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Summary