Lapisan ggplot2

Pengantar Visualisasi Data dengan ggplot2

Rick Scavetta

Founder, Scavetta Academy

Paket ggplot2

Tata bahasa grafik diimplementasikan di R
Dua konsep kunci:
1. Elemen tata bahasa berlapis
2. Pemetaan estetika

Data

Dataset iris

¹ Fisher, R. A. (1936) The use of multiple measurements in taxonomic problems. Annals of Eugenics, 7, Part II, 179–188. ² Anderson, Edgar (1935). The irises of the Gaspe Peninsula, Bulletin of the American Iris Society, 59, 2–5.

Dataset iris

iris

    Sepal.Length Sepal.Width Petal.Length Petal.Width    Species
1            5.1         3.5          1.4         0.2     setosa
2            4.9         3.0          1.4         0.2     setosa
3            4.7         3.2          1.3         0.2     setosa
...
50           5.0         3.3          1.4         0.2     setosa
51           7.0         3.2          4.7         1.4 versicolor
52           6.4         3.2          4.5         1.5 versicolor
53           6.9         3.1          4.9         1.5 versicolor
...
100          5.7         2.8          4.1         1.3 versicolor
101          6.3         3.3          6.0         2.5  virginica
102          5.8         2.7          5.1         1.9  virginica
103          7.1         3.0          5.9         2.1  virginica
...
150          5.9         3.0          5.1         1.8  virginica

Estetika

Estetika iris

Geometri

Geometri iris

g <- ggplot(iris, aes(x = Sepal.Length, y = Sepal.Width)) +
  geom_jitter()
g

Tema

Tema iris

g <- g +
  labs(x = "Panjang Sepal (cm)", y = "Lebar Sepal (cm)") +
  theme_classic()
g

Ayo berlatih!

Pengantar Visualisasi Data dengan ggplot2