January 2014
Beginner to intermediate
860 pages
20h 37m
Japanese
Content preview from Rクイックリファレンス 第2版
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
277
277
13.1 R グラフィックスの概要
これを行列に変換してプロットしましょう。
> #
行列に変換する
> doctorates.m <- as.matrix(doctorates[2:7])
> rownames(doctorates.m) <- doctorates[, 1]
> doctorates.m
engineering science education health humanities other
2001 5323 20643 6436 1591 5213 2159
2002 5511 20017 6349 1541 5178 2141
2003 5079 19529 6503 1654 5051 2209
2004 5280 20001 6643 1633 5020 2180
2005 5777 20498 6635 1720 5013 2480
2006 6425 21564 6226 1785 4949 2436
barplot
関数はデータフレームには使えないので、この問題のためにこのデータで
行列オブジェクトを作成しました。
まずは、
2001
年の分野ごとの博士号の棒グラフを表示しましょう。
> barplot(doctorates.m[1, ])
図
13-7
からわかるように、デフォルトでは
R
は棒の高さに合わせて
y
軸を表示し
ますが、
x
軸は表示しません。また、
R
は列名を使って棒に自動的に名前を付けます。
ここで、各年の棒を積み重ねてすべての年を表示したいとしましょう。さらに、棒を ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.