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
8.17
軸目盛に日付を使う
229
ylim(0, max(mdeaths_mod$deaths))
図8-36 左：0から12までのx値を表した極座標プロット
右：0月のダミーデータを追加して折れ線をつなげた極座標プロット
%+%
という演算子を使っていることに注意してください。
ggplot
オブジェクトに
%+%
でデー
タフレームを追加すると、デフォルトのデータフレームが新しいデータフレームで置き換え
られます。この例の場合には、
p
のデフォルトデータフレームが
mdeaths_mod
から
mdeaths_
new
に変わります。
関連項目
凡例の順番を反転させる方法については、「レシピ10.4 凡例の項目順を反転させる」を参照してく
ださい。
目盛の位置とラベルを指定する方法については、「レシピ8.6 目盛の位置を設定する」を参照してく
ださい。
レシピ
8.17
軸目盛に日付を使う
問題
軸に日付を使いたい。
解決策
x
軸か
y
軸に
Date
クラスの列をマッピングします。次の例では、
economics
データセットを使います。
economics
#> # A tibble: 574 x 6
#> date pce pop psavert uempmed unemploy
230
8
章 軸
#> <date> <dbl> <int> ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.