August 2018
Intermediate to advanced
227 pages
4h 16m
Chinese
Content preview from 高效R语言编程
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高效安装
｜
41
TMPDIR=/data/R_tmp/
当
R
运行时，它创建临时副本，在我的计算机上，默认目录是网络驱动器。
R_COMPILE_PKGS=3
字节编译所有包（详见第
3
章）。
R_LIBS_SITE=/usr/lib/R/site-library:/usr/lib/R/library
我明确指出查找包的位置。我的大学有一个包含过时包的目录，我想避免
使用这个目录。
R_DEFAULT_PACKAGES=utils,grDevices,graphics,stats,methods
显式声明加载包。请注意，我不加载数据包却要确保方法总被正确加载。
这是因为历史原因，在某些应用（如 Rscript）中，方法包未默认加载。
练习
1.
启动文件会被保存在哪三个目录中？这三个目录在你计算机上的具体位置
是什么？
2.
每一个目录中都有
.Rprofile
文件或
.Renviron
文件吗？
3.
在你的当前工作目录中创建一个
.Rprofile
文件，用于每次从此处启动
R
时，
输出信息“Hppy efficient R programming”。
4.
当你在 HOME 目录或当前项目目录下创建启动文件时，R_HOME 目录下的文
件会怎样？
RStudio
RStudio
是
R
的集成开发环境（
IDE
）。它直观、灵活的操作界面简化了
R
使
用者和开发者的工作。
RStudio
的强大功能帮助你成为一个更高效的、更有生
产力的
R
程序员。例如，
RStudio
智能的自动完成功能可以减少你记忆和输入
函数名称的时间。下面列举一些
RStudio ...
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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.