data visualization - eazybi community€¦ · data visualization do’s & don’ts janis...
TRANSCRIPT
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Data Visualization Do’s & Don’ts
Janis Gulbis
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Janis Gulbis
Part of my job is to sit in the corner and look at paintings reports.
Mr. Bean
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Community Days May 16-7, 2019 Why
Analyze?
Why Visualize?
How?
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May the report creation force be
with you!Where Did It All Start?
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Basic Stone-Age Survival Math
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Baboons Can Count Too
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RESULTS
67% of the time the baboons chose the fullest container...
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You can’t improve what you can’t manage, you can’t manage what you can't control, and you can’t control what you don’t measure.
TOM DEMARKO
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From Data to Wisdom
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From Data to Wisdom
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From Data to Wisdom
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From Data to Wisdom
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From Data to Wisdom
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Visual Pattern Rcognition
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FACTS
90% of information transmitted to the brain is visual.
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FACTS
Visualizations help us detect patterns, trends, and correlations.
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FACTS
Visuals are more strongly tied to memory.
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FACTS
Visual content drives engagement.
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How To Choose The Best Chart Type?
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4 Basic Methods of Visual Data Analysis
Comparison
RelationshipDistribution
Composition
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Comparison
• Compare two or more values side by side
• List key values
• Rank values from best to worst or vice versa.
• Show patterns, gaps, spikes, outliers, or trends.
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Composition
• Show part to whole relationship. • Show how a total value can be divided into parts
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Distribution
• Comparison and Composition.
• Correlations, trends, patterns, shapes, clusters, averages, or outliers.
• Deviation or Variance analysis.
• Visualize related or unrelated data points.
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Relationship
• Show the relationship, correlation, or connection.
• Find correlations, trends, patterns, clusters, averages, or outliers.
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Do’s & Don’ts for Different Chart
Types
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Table Charts
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USE TABLES USE CHARTS
• You need to compare or look up individual values.
• You require precise values.
• Values involve multiple units of measure.
• The data has to communicate quantitative information, but not trends.
• You want to convey a message that is contained in the shape of the data.
• The chart is used to show a relationship between many values.
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Column & Bar Charts
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Column Charts
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Column Histogram Charts
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Stacked Column Charts
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Relative Stacked Column Charts
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DO’S DON’TS
• Compare max 5-7 categories. • More than 7 categories
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DO’S DON’TS
• Time dimensions on the horizontal axis.
• Time from left to right.
• Time dimension on Vertical axis
• Reorder chronological data charts.
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DO’S DON’TS
• Value axis must start at zero. • Numerical starts at a non-zero base.
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Bar Charts
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Stacked Bar Charts
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Line & Area Charts
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Line Charts
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TimeLine Charts
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Area Charts
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Stacked Area Charts
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DO’S DON’TS
• Present continuous data in an interval scale, where intervals are equal in size.
• Emphasize rate of change or an overal trend
• Time from left to right – always.
• Remove guidelines to emphasize the trend, rate of change, and to reduce distraction.
• Do not skip values
• Don’t squeze or expand line charts
• Aim for less than a 45-degree slope.
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Pie Charts and Donut Charts
Donut Use Pie Charts
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How Pie Charts Work
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Bad Pie Chart
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Better Use of Donut Charts
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Pie Charts
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Better Use of Donut Charts
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DO’S DON’TS
• Total sum of all segments equals 100%
• Less than 6 categories.
• Ideally only 2 categories (us vs others)
• Don’t use for identical or very different values.
• Don’t use 3D or blow apart effects.
• Don’t use a pie charts to COMPARE
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Scatter Charts
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Scatter Bubble Charts
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Problems with Bubbles
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Map Charts
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Map Charts
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Gantt Charts
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Gantt Charts
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Gauge Charts
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Mixed Charts
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Conclusion
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Remove excess information – lines, colors, text – if not
adding value.
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Sort by the value, not by name
(except for time dimension)
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Use labels directly when possible
line, column, bar, pie, charts
![Page 131: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/131.jpg)
Use same color in different intensity
to compare to previous periods.
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Use different colors for different measures.
![Page 133: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/133.jpg)
Use the same color for a measure
across reports.
![Page 134: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/134.jpg)
Make charts readable for color-
blind people.
![Page 135: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/135.jpg)
Use Time on horizontal axis.
Left to right.
Don’t skip periods.
![Page 136: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/136.jpg)
Don’t overcomplicate
your charts.
![Page 138: Data Visualization - eazyBI Community€¦ · Data Visualization Do’s & Don’ts Janis Gulbis. Janis Gulbis Part of my job is to sit in the corner and look at paintings reports](https://reader035.vdocuments.site/reader035/viewer/2022070811/5f0a989a7e708231d42c68c4/html5/thumbnails/138.jpg)
Thank you!