An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz...
Transcript of An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz...
![Page 1: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/1.jpg)
Anoverviewofdataviz caveats
Anexplorationofdataviz bad practices
Yan-holtz.com/teaching
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What’s wrong withthis chart?
![Page 3: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/3.jpg)
Calculation+3D+
Piechart
![Page 4: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/4.jpg)
What’s wrongwith piechart?
What can you see?
![Page 5: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/5.jpg)
What’s wrong withpiechart? It is hardto
distinguish angles
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What’s wrongwith 3D
![Page 7: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/7.jpg)
What could be betterhere?
![Page 8: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/8.jpg)
Order your data
![Page 9: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/9.jpg)
Anything wrong here?
![Page 10: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/10.jpg)
Bimodaldistribution
Almost nodata!
Boxplot =hide information
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Bimodaldistribution
Almost nodata!
Boxplot =hide information
Ifsmall sample size,add datapointswith jitter
![Page 12: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/12.jpg)
Ifbig sample size,useviolinplot
Showsample size
Showdistribution
![Page 13: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/13.jpg)
Lookatthis chart
![Page 14: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/14.jpg)
What doyou remember?
![Page 15: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/15.jpg)
TheSpaghettichartReadmore
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Mind theaspectratioReadmore
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Theissuewitherror barsReadmore
![Page 20: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/20.jpg)
Theissuewitherror barsReadmore
![Page 21: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/21.jpg)
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Source:FastFedorablog
Size=radius Size=area
![Page 23: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/23.jpg)
Source:FastFedorablog
Size=radius Size=area
Area=poormetaphor
![Page 24: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/24.jpg)
Source: Fox News, via Media Matters for America
![Page 25: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/25.jpg)
Source: Fox News, via Media Matters for America
Obamaadminitration
=2xmore
apprehensions?
![Page 26: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/26.jpg)
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“In general, in a time-series, use a baseline that shows the data not the zeropoint” - Edward Tufte
![Page 28: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/28.jpg)
Source: KD Nuggets
![Page 29: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/29.jpg)
Source: KD Nuggets
ReverseYAxis
Donotbecounterintuitive
![Page 30: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/30.jpg)
Data-to-viz.com/caveats
DatatoViz
Acollectionofdataviz caveats
![Page 31: An exploration of dataviz badpractices - Yan Holtz · 2020. 4. 19. · An overview of dataviz caveats An exploration of dataviz badpractices Yan-holtz.com/teaching](https://reader034.fdocuments.us/reader034/viewer/2022051812/60292e26e4a6c60c061dd0bd/html5/thumbnails/31.jpg)
Thanks
Yan-holtz/teachingSlides:
Data-to-viz.comDatatoviz:
www.yan-holtz.com
@R_Graph_Gallery
github.com/holtzy