Variables continues ou catégorielles

Afin de choisir le type de diagramme approprié, vous devez être en mesure de faire la distinction entre les variables continues (« les choses sur lesquelles vous pouvez faire de l'arithmétique ») et les variables catégorielles (« les choses qui peuvent être classées »).

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<cours>Comprendre la visualisation des données</cours>

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Cet exercice fait partie du cours

<cours>Comprendre la visualisation des données</cours>

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In this chapter you’ll learn the value of visualizations, using real-world data on British monarchs, Australian salaries, Panamanian animals, and US cigarette consumption, to graphically represent the spread of a variable using histograms and box plots.

Exercise 1: Un diagramme vaut mille mots Exercise 2: Visualisation éloquente Exercise 3: Variables continues ou catégorielles

Exercice actuel

Exercise 4: Histogrammes Exercise 5: Interprétation des histogrammes Exercise 6: Réglage de la largeur des barres Exercise 7: Diagrammes en boîte Exercise 8: Interprétation des diagrammes en boîte Exercise 9: Organisation de diagrammes en boîte

You’ll learn how to interpret data plots and understand core data visualization concepts such as correlation, linear relationships, and log scales. Through interactive exercises, you’ll also learn how to explore the relationship between two continuous variables using scatter plots and line plots. You'll explore data on life expectancies, technology adoption, COVID-19 coronavirus cases, and Swiss juvenile offenders. Next you’ll be introduced to two other popular visualizations—bar plots and dot plots—often used to examine the relationship between categorical variables and continuous variables. Here, you'll explore famous athletes, health survey data, and the price of a Big Mac around the world.

Exercise 1: Scatter plots Exercise 2: Interpreting scatter plots Exercise 3: Trends with scatter plots Exercise 4: Line plots Exercise 5: Interpreting line plots Exercise 6: Logarithmic scales for line plots Exercise 7: Bar plots Exercise 8: Interpreting bar plots Exercise 9: Interpreting stacked bar plots Exercise 10: Dot plots Exercise 11: Interpreting dot plots Exercise 12: Sorting dot plots

It’s time to make your insights even more impactful. Discover how you can add color and shape to make your data visualizations clearer and easier to understand, especially when you find yourself working with more than two variables at the same time. You'll explore Los Angeles home prices, technology stock prices, math anxiety, the greatest hiphop songs, scotch whisky preferences, and fatty acids in olive oil.

Exercise 1: Higher dimensions Exercise 2: Another dimension for scatter plots Exercise 3: Another dimension for line plots Exercise 4: Using color Exercise 5: Eye-catching colors Exercise 6: Qualitative, sequential, diverging Exercise 7: Highlighting data Exercise 8: Plotting many variables at once Exercise 9: Interpreting pair plots Exercise 10: Interpreting correlation heatmaps

In this final chapter, you’ll learn how to identify and avoid the most common plot problems. For example, how can you avoid creating misleading or hard to interpret plots, and will your audience understand what it is you’re trying to tell them? All will be revealed! You'll explore wind directions, asthma incidence, and seats in the German Federal Council.

Exercise 1: Polar coordinates Exercise 2: Pie plots Exercise 3: Rose plots Exercise 4: Axes of evil Exercise 5: Bar plot axes Exercise 6: Dual axes Exercise 7: Sensory overload Exercise 8: Chartjunk Exercise 9: Multiple plots Exercise 10: Congratulations