Spostare la legenda

Concludiamo questo corso creando un grafico pronto per la pubblicazione che comunichi un messaggio chiaro.

Per modificare gli elementi stilistici di un grafico, usa theme() e imposta le proprietà del grafico su un nuovo valore. Ad esempio, il seguente codice cambia la posizione della legenda.

p + theme(legend.position = new_value)

Qui, il nuovo valore può essere

"top", "bottom", "left" o "right'": la posiziona su quel lato del grafico.
"none": non disegnare la legenda.
c(x, y): c(0, 0) indica in basso a sinistra e c(1, 1) indica in alto a destra.

Rivediamo il grafico a linee sul periodo di recessione (assegnato a plt_prop_unemployed_over_time).

Questo esercizio fa parte del corso

Introduzione alla visualizzazione dei dati con ggplot2

Visualizza il corso

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

# View the default plot
plt_prop_unemployed_over_time

# Remove legend entirely
plt_prop_unemployed_over_time +
  ___

Modifica ed esegui il codice

Questo esercizio fa parte del corso

Introduzione alla visualizzazione dei dati con ggplot2

InicianteNível de habilidade

4.8+

Inizia il corso gratis

In this chapter we’ll get you into the right frame of mind for developing meaningful visualizations with R. You’ll understand that as a communications tool, visualizations require you to think about your audience first. You’ll also be introduced to the basics of ggplot2 - the 7 different grammatical elements (layers) and aesthetic mappings.

Exercise 1: Introduction Exercise 2: Explore and explain Exercise 3: Drawing your first plot Exercise 4: Data columns types affect plot types Exercise 5: The grammar of graphics Exercise 6: Mapping data columns to aesthetics Exercise 7: Understanding variables Exercise 8: ggplot2 layers Exercise 9: Adding geometries Exercise 10: Changing one geom or every geom Exercise 11: Saving plots as variables

Aesthetic mappings are the cornerstone of the grammar of graphics plotting concept. This is where the magic happens - converting continuous and categorical data into visual scales that provide access to a large amount of information in a very short time. In this chapter you’ll understand how to choose the best aesthetic mappings for your data.

Exercise 1: Visible aesthetics Exercise 2: All about aesthetics: color, shape and size Exercise 3: All about aesthetics: color vs. fill Exercise 4: All about aesthetics: comparing aesthetics Exercise 5: Aesthetics for categorical & continuous variables Exercise 6: Using attributes Exercise 7: All about attributes: color, shape, size and alpha Exercise 8: All about attributes: conflicts with aesthetics Exercise 9: Going all out Exercise 10: Modifying aesthetics Exercise 11: Updating aesthetic labels Exercise 12: Setting a dummy aesthetic Exercise 13: Aesthetics best practices Exercise 14: Appropriate mappings

A plot’s geometry dictates what visual elements will be used. In this chapter, we’ll familiarize you with the geometries used in the three most common plot types you’ll encounter - scatter plots, bar charts and line plots. We’ll look at a variety of different ways to construct these plots.

Exercise 1: Scatter plots Exercise 2: Overplotting 1: large datasets Exercise 3: Overplotting 2: Aligned values Exercise 4: Overplotting 3: Low-precision data Exercise 5: Overplotting 4: Integer data Exercise 6: Histograms Exercise 7: Drawing histograms Exercise 8: Positions in histograms Exercise 9: Bar plots Exercise 10: Position in bar and col plots Exercise 11: Overlapping bar plots Exercise 12: Bar plots: sequential color palette Exercise 13: Line plots Exercise 14: Basic line plots Exercise 15: Multiple time series

In this chapter, we’ll explore how understanding the structure of your data makes data visualization much easier. Plus, it’s time to make our plots pretty. This is the last step in the data viz process. The Themes layer will enable you to make publication quality plots directly in R. In the next course we'll look at some extra layers to add more variables to your plots.

Exercise 1: Temi da zero Exercise 2: Spostare la legenda

Esercizio in corso

Exercise 3: Modificare gli elementi del tema Exercise 4: Modificare gli spazi bianchi Exercise 5: Flessibilità dei temi Exercise 6: Temi integrati Exercise 7: Esplorare ggthemes Exercise 8: Impostare i temi Exercise 9: Grafici di qualità da pubblicazione Exercise 10: Grafici esplicativi efficaci Exercise 11: Usare i geoms per grafici esplicativi Exercise 12: Usare annotate() per gli abbellimenti