Why You Should Never Use Radar Plots - Data Visualisation

Toulouse School of Economics, INRA. @Xtophe_Bontemps ... Data exploration. Graphs as visual tests, ... simplification data exploration implies exhaustivity” ...
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Radar Plots

Why Using radar Plot ?

Why You Should Never Use Radar Plots !

Christophe Bontemps Toulouse School of Economics, INRA @Xtophe_Bontemps

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M Y J OB

Radar Plots

Why Using radar Plot ?

Before we start

Radar Plots

Why Using radar Plot ?

W HAT IS DATA VISUALIZATION ? Data visualisation serves at least two main purposes : I

Data exploration Graphs as visual tests, comparisons (short time to built and to read)

Before we start

Radar Plots

Why Using radar Plot ?

W HAT IS DATA VISUALIZATION ? Data visualisation serves at least two main purposes : I

Data exploration Graphs as visual tests, comparisons (short time to built and to read)

I

Data representation Summaries, storytelling (long time to build, short time to read)

Before we start

Radar Plots

Why Using radar Plot ?

W HAT IS DATA VISUALIZATION ? Data visualisation serves at least two main purposes : I

Data exploration Graphs as visual tests, comparisons (short time to built and to read)

I

Data representation Summaries, storytelling (long time to build, short time to read) The problem is that : “ Communicating implies simplification data exploration implies exhaustivity”

Before we start

Radar Plots

Why Using radar Plot ?

R ADAR P LOT Radar plots or charts, also called Spider or Web charts are very popular tools for representing individuals scores of brands, firms, players recorded or evaluated for different variables, different activities or dimensions.

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Radar Plots

R ADAR P LOT : E XAMPLE

Why Using radar Plot ?

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Radar Plots

R ADAR P LOT : C ONSTRUCTION

Why Using radar Plot ?

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Radar Plots

Why Using radar Plot ?

R ADAR P LOT : U SE Comparing multi dimensions for various observations/users

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Radar Plots

R ADAR P LOT : U SE Comparison is based "visually" by examining surfaces

The best surface has the best results, right ?

Why Using radar Plot ?

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Radar Plots

S O WHY THIS TITLE ?

Why You Should Never Use Radar Plots !

Let’s do a practical example : with

Why Using radar Plot ?