Effective data visualisation

Maarten

Lambrechts

CFO Top

21 November 2019

Data visualisation?

Year Imports Exports
1700 71,1 32,8
1705 74,5 40,9
1710 82,6 59
1715 87,2 77,9
1720 96,8 75,2
1725 102,6 71,3
1730 96,4 64,7
1735 93,7 60,5
1740 92,9 65,1
1745 92,5 74,3
1750 90,1 77,4
1755 79,9 82,8
1760 76,6 117,5
1765 79,6 151,8
1770 83,8 163,8
1775 90,4 175,7
1780 92,7 185,4

Explanatory data visualisation

Exploratory data visualisation

You have a message

 

You want people to understand

 

You want people to take action

Explanatory data visualisation

using an appropriate chart type

using text on charts smartly

designing your charts well

using storytelling techniques

Help your data message to get across by

Chart types

Save the pies for dessert

Don't cut bars

Show evolution over time with line charts

Don't break time axes

Compare 2 moments in time with slopecharts

Treemaps can show numbers in a hierarchy

Use small multiples to avoid spaghetti charts

Introducing:

the Benchmark Plot™

🛠️

Text & charts

Tell your message in the chart title

"The annotation layer is the most important thing we do. Otherwise it's a case of here it is, you go figure it out."

Amanda Cox, The New York Times

Use direct labelling

Chart design

Use colors deliberately

Use colors sparingly

Don't let the data compete for attention

Avoid chart junk

The width:height ratio of a chart matters

🛠️

Storytelling

"You have to be like the worst tabloid newspaper in the front and the Academy of Science in the back."

Hans Rosling

1 chart,

1 message

Data story patterns

Intersections

Outliers

Components

Repetition

Gradual visual reveal

using an appropriate chart type

using text on charts smartly

designing your charts well

using storytelling techniques

Help your data message to get across by

What are your questions?

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