在R启动时运行R脚本 [英] Run R script with the start up of R

问题描述

我只想在启动R
时自动运行R脚本 example.r 我正在使用 R版本3.2.3

I just want to run an R script example.r automatically when I start R I am using R version 3.2.3 on centOS

我搜索了这个，但我不知道。

I searched for this but I couldn't figure that out.

推荐答案

R的启动行为可以通过编辑 Rprofile.site ，这可能需要创建，因为默认的R安装不会自动为您执行此操作。在CentOS 7上，此文件应位于目录 / usr / lib64 / R / etc / 中；或更普遍的是 $ R_HOME / etc / ，其中 R_HOME 可以通过运行 Sys来确定。 R会话中的getenv（ R_HOME）。

The startup behavior of R can be modified by editing Rprofile.site, which may need to be created, as the default R installation does not do this for you automatically. On CentOS 7, this file should be located in the directory /usr/lib64/R/etc/; or more generally $R_HOME/etc/, where R_HOME can be determined by running Sys.getenv("R_HOME") from an R session.

例如，如果我按如下方式修改 Rprofile.site

For example, if I modify my Rprofile.site as follows,

[nathan@xxx] cat /tmp/example.r
x <- 1.5
y <- 2.5
z <- 3.5
t <- Sys.time()

[nathan@xxx] cat /usr/lib64/R/etc/Rprofile.site
options(prompt = "R> ")
options(continue = "  ")
options(stringsAsFactors = FALSE)
options(scipen = 4)

source("/tmp/example.r")

更改将反映在新的R会话中：

the changes will be reflected in a new R session:

尽管在在此示例中，习惯上将此类代码包装在中。首先<-function（）{...} 以确保其在会话启动后立即运行：

Although apparently not necessary in this example, it is customary to wrap such code in .First <- function() { ... } to ensure that it is run immediately upon session startup:

[nathan@xxx] cat /usr/lib64/R/etc/Rprofile.site
options(prompt = "R> ")
options(continue = "  ")
options(stringsAsFactors = FALSE)
options(scipen = 4)

.First <- function() {
    source("/tmp/example.r")
}

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