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    <title>Principes de design, Visualisation de données tabulaires</title>
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class: center, middle, title

# UE Visualisation

### 2020-2021

## Dr. Maxime Wack

### AHU Informatique médicale
#### Hôpital Européen Georges Pompidou, &lt;/br&gt; Université de Paris

---
class: center, middle
# Objectifs

## Principes de design

## Visualisation de données tabulaires

---
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# Principes de design

---
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# *Éléments* de design

### Espace
### Point
### Ligne
### Surface
### Taille
### Couleur
### Forme
### ...

---
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# *Principes* de design

Autant de principes que de designers

![:scale 50%](03-img/designprinciples.png)

[https://principles.design](https://principles.design)

---
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# Principes de design

### Unité/Harmonie
### Motifs
### Équilibre
### Hiérarchisation
### Mouvement
### Contraste

---
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# Unité / Harmonie

.pull-left[
### Principe **fondamental** de la visualisation

### L'ensemble doit être **visuellement cohérent**

### Notion de **composition** des éléments en un tout
]

.pull-right[![:scale 100%](03-img/princ_unite.png)]

---
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# Motifs

.pull-left[
### Répétition **régulière** d'un ou plusieurs *éléments*

### Principal outil de la visualisation de **collections de données**
]

.pull-right[![:scale 100%](03-img/princ_motif.png)]

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# Équilibre

.pull-left[
### Distribution **équilibrée** des éléments visuels

### Utiliser la **symmétrie** pour comparer

### Utiliser l'**assymétrie** pour appuyer sur les différences

### La symmétrie **radiale** permet d'organiser autour d'un élément central
]

.pull-right[![:scale 100%](03-img/princ_equilibre.png)]

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# Hiérarchisation

.pull-left[
### **Insister** sur le message à communiquer

### Donner une **importance relative** indicative de la réalité

### Choix des couleurs (*rareté* des couleurs)

### Gestion du **contraste**

### **Échelles** et **proportions**
]

.pull-right[![:scale 80%](03-img/princ_hierarch.png)]

---
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# Mouvement

.pull-left[
### Même sur une image **fixe**

### Notion de directionalité

### **Diriger** le regard du lecteur
]

.pull-right[![:scale 100%](03-img/princ_mouvement.png)]

---
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# Contraste

.pull-left[
### **Juxtaposition** d'éléments **opposés** (couleur, luminosité, direction)

### Mise en avant **relative**

### Contraste ↔ Similarité
]

.pull-right[![:scale 100%](03-img/princ_contraste.png)]

---
class:center,middle

# Code

## **Pas** de code spécifique

### Application des *principes* en manipulant les *éléments*

### *Data* → **Motifs, Mouvement**
### *Aesthetics* → **Hiérarchisation, Contraste**
### *Theme* → **Unité, Équilibre**

---
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# Exemples

[Dark Horse Analytics](https://www.darkhorseanalytics.com/blog/data-looks-better-naked)

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![](03-img/data-ink.gif)

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![](03-img/ClearOffTheTableMd.gif)

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![](03-img/map_reduce2.gif)

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![](03-img/devourThePie3.gif)

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# Visualisation de données tabulaires

---
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# Excel

![](03-img/excel_data.png)

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![](03-img/excel_menu.png)

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![](03-img/excel_graph.png)

---

# Edgar F Codd

.pull-left[

### 1923 - 2003

### Prix Turing 1981

### Inventeur des **modèles relationnels** pour la gestion de bases de données

### Définition des formes normales dans un papier de conférence en **1971**

]

.pull-right[![](03-img/Edgar_F_Codd.jpg)]

---

# Formes normales

## 1NF : une donnée par cellule
*Le domaine de chaque attribut ne contient que des données atomiques*

## 2NF : 1NF + attributs par clé
*Un attribut non-clé ne dépend pas d'une partie de la clé mais de toute la clé*

## 3NF : 2NF + attributs de la clé indépendants les uns des autres
*Un attribut non-clé ne dépend pas d'un ou plusieurs attributs ne participant pas à la clé*

---
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# 1NF

.tiny[
<div id="htmlwidget-ed9a1e3d61409db59c35" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-ed9a1e3d61409db59c35">{"x":{"filter":"none","data":[["TV"],["samsung, sony"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Produit<\/th>\n      <th>Fournisseur<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>
]
↓
<div id="htmlwidget-ebe80773fb69db27cf4f" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-ebe80773fb69db27cf4f">{"x":{"filter":"none","data":[["TV","TV"],["samsung","sony"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Produit<\/th>\n      <th>Fournisseur<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>

---
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# 2NF

<div id="htmlwidget-ee242f05e408d1eb9179" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-ee242f05e408d1eb9179">{"x":{"filter":"none","data":[["TV","Phone","TV"],["Samsung","Samsung","Sony"],["Seoul","Seoul","Tokyo"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Produit<\/th>\n      <th>Fournisseur<\/th>\n      <th>Ville<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>
↓
<div id="htmlwidget-c801f7d6b53b7811b729" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-c801f7d6b53b7811b729">{"x":{"filter":"none","data":[["TV","Phone","TV"],["Samsung","Samsung","Sony"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Produit<\/th>\n      <th>Fournisseur<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script><div id="htmlwidget-0148400918fb4a491269" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-0148400918fb4a491269">{"x":{"filter":"none","data":[["Samsung","Sony"],["Seoul","Tokyo"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Fournisseur<\/th>\n      <th>Ville<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>

---
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# 3NF

<div id="htmlwidget-a89ba4457df337d092d6" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-a89ba4457df337d092d6">{"x":{"filter":"none","data":[["Samsung","Sony"],["Seoul","Tokyo"],["Corée du sud","Japon"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Fournisseur<\/th>\n      <th>Ville<\/th>\n      <th>Pays<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>
↓
<div id="htmlwidget-8e92e02ba989d695591a" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-8e92e02ba989d695591a">{"x":{"filter":"none","data":[["Samsung","Sony"],["Seoul","Tokyo"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Fournisseur<\/th>\n      <th>Ville<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script><div id="htmlwidget-8a3bbe898c949d9851bb" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-8a3bbe898c949d9851bb">{"x":{"filter":"none","data":[["Seoul","Tokyo"],["Corée","Japon"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Ville<\/th>\n      <th>Pays<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>

---
class: center

# À plat

<div id="htmlwidget-ef3bd6c9602e98da3370" style="width:100%;height:auto;" class="datatables html-widget"></div>
<script type="application/json" data-for="htmlwidget-ef3bd6c9602e98da3370">{"x":{"filter":"none","data":[["TV","Phone","TV"],["Samsung","Samsung","Sony"],["Seoul","Seoul","Tokyo"],["Corée","Corée","Japon"]],"container":"<table class=\"display\">\n  <thead>\n    <tr>\n      <th>Produit<\/th>\n      <th>Fournisseur<\/th>\n      <th>Ville<\/th>\n      <th>Pays<\/th>\n    <\/tr>\n  <\/thead>\n<\/table>","options":{"paging":false,"info":false,"searching":false,"order":[],"autoWidth":false,"orderClasses":false}},"evals":[],"jsHooks":[]}</script>

### Opération facile à réaliser

### Chaque observation contient toute l'information

---
class: center

# Avec ggplot2

### Relation **1:1** entre *observation* et unité de *geometry*

### Valeur d'*aesthetic* directement accessible par *observation*
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