June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
Content preview from R 语言经典实例（原书第 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.
时间序列分析
｜
415
IBM: Historical vs. Inflation-Adjusted 2000-01-01/2017-12-29
200
150
100
50
200
150
100
50
Jan 01
2000
Jan 01
2002
Jan 01
2004
Jan 01
2006
Jan 01
2008
Jan 01
2010
Jan 01
2012
Jan 01
2014
Jan 01
2016
Dec 29
2017
ibm
ibm.inf
图 14-1：示例
xts
图
xts 的 plot 函数提供默认标题，即 xts 对象的名称。正如我们在此处所示，通常可以
将参数 main 设置为更有意义的标题。
代码指定了两种线型（lty），以便两条线以两种不同的样式绘制，使它们更容易区分。
14.2.4 另请参阅
对于处理金融数据，quantmod 包包含特殊的绘图功能，可生成各种类型的漂亮图形。
14.3 提取最早或者最新的观测值
14.3.1 问题
需要查看时间序列中最早或最新的观测值。
14.3.2 解决方案
使用函数 head 查看最早的观测值：
head(
ts
)
使用函数 tail 查看最新观测值：
tail(
ts
)
416
｜
第
14
章
14.3.3 讨论
head 和 tail 函数都是泛型函数，因此无论数据是存储在简单向量、zoo 对象还是
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.