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
13.14
経験累積分布関数のグラフを作成する
339
レシピ
13.14
経験累積分布関数のグラフを作成する
問題
データセットから経験累積分布関数（
empirical cumulative distribution function
、
ECDF
）のグラ
フを作成したい。
解決策
stat_ecdf()
を使用します（図13-26）。
library(gcookbook) #
データセットの読み込み
# heightIn
の
ECDF
ggplot(heightweight, aes(x = heightIn)) +
stat_ecdf()
# ageYear
の
ECDF
ggplot(heightweight, aes(x = ageYear)) +
stat_ecdf()
図13-26 左：身長のECDF 右：年齢のECDF
解説
経験累積分布関数は、与えられた
x
値に対して
x
以下の観測値の割合を示します。この関数は経験
的な分布関数であり、
1
つ以上の観測値があった
x
値で階段状に増加します。
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