November 2019
Intermediate to advanced
472 pages
9h 23m
Japanese
Content preview from Rグラフィックスクックブック 第2版 ―ggplot2によるグラフ作成のレシピ集
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レシピ
4.7
積み上げ面グラフを作成する
75
関連項目
色を選択する方法についてより詳しくは、「12章 色を使う」を参照してください。
レシピ
4.7
積み上げ面グラフを作成する
問題
積み上げ面グラフを作成したい。
解決策
geom_area()
を使用して、ファクタを
fill
にマッピングします（図 4-20）。
library(gcookbook) # uspopage
データセットを使うために
gcookbook
を読み込む
ggplot(uspopage, aes(x = Year, y = Thousands, fill = AgeGroup)) +
geom_area()
図4-20 積み上げ面グラフ
解説
積み上げ面グラフでプロットされるデータはしばしば
wide
フォーマット（横持ち形式）で提供されま
すが、
ggplot
では
long
フォーマット（縦持ち形式）のデータが必要になります。データ型の変換につい
ては、「レシピ15.19 横持ち形式から縦持ち形式へ変換する」を参照してください。
ここでは、
uspopage
データセットを例として使用します。
uspopage
#> Year AgeGroup Thousands
#> 1 1900 <5 9181
76
4
章 折れ線グラフ
#> 2 1900 5-14 16966 ...
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