如何使用命令重新加载当前的 R 脚本文件? [英] How to reload current R script file with a command?

问题描述

如何在当前 R 脚本文件被另一个程序更改后使用命令重新加载它?

How to reload current R script file with a command after it has been changed by another program?

假设有一个名为 test.R 的初始文件，内容如下:

Assume there is an initial file called test.R with following content:

1 # a random number

y <- readLines("test.R") # read the script

x <- as.numeric(y[1]) # convert the number to numeric
x <- x + 1 # increase the number by 1
y[1] <- x # assign the value to y
print(y[1]) 
writeLines(y, "test.R") # replace the old file by the new file

现在我想重新加载当前文件，以便在文件本身内更新内容.由于几年 RStudio 具有重新加载功能，但我不能等到 RStudio 的更新信号被触发.我想自己触发.这是相关的，因为我想编写一个 R 函数，它会自动为 xaringan 生成一个目录.

and now I would like to reload the current file such that the content is updated within the file itself. Since a couple of years RStudio has a reloading feature, but I cannot wait until RStudio's update signal is triggered. I want to trigger it myself. This is relevant because I would like to write a R function which generates a table of content automatically for xaringan.

关于SO的链接问题.

推荐答案

我能做的就是

document_reload <- function() {
  path <- rstudioapi::getActiveDocumentContext()$path
  rstudioapi::documentClose()
  shell(path)
}

document_reload()

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