如何在 Windows 上调用使用 scan() 的脚本? [英] How to invoke script that uses scan() on Windows?

问题描述

如何调用如下所示的 R 脚本

How to invoke an R script like the following

scan()

在 Windows 中?使用 R 或 Rscript 时，不会读取任何内容.使用 Rscript 或 littler(均在 Linux 上)，脚本按预期工作.

in Windows? When using either R or Rscript, nothing is read. With Rscript or littler (both on Linux) the script works as expected.

# Doesn't work because stdin is already redirected
R --no-save < test.R

# Works on Linux, doesn't on Windows
Rscript test.R

# Works on Linux, doesn't exist in Windows
r test.R

有没有办法在不改变 R 代码的情况下实现这一目标?

Is there any way at all to achieve this without changing the R code?

也许相关:为什么Windows中没有--interactive开关?

Perhaps related: Why is there no --interactive switch in Windows?

推荐答案

因此，正如我们在评论中所讨论的，并经过@nograpes 的确认，您可以使用以下内容:

So as we discussed in the comments and with confirmation of @nograpes, you can use the following:

scan(file("stdin"), what=character())

在脚本中而不是 scan() 中，以便在命令行界面中执行脚本时以交互方式从标准输入读取.
然后您需要点击 Ctrl + Z 结束 Windows 下的扫描(Ctrl + D 在 Mac 上).

in a script instead of scan() to read interactively from standard input when the script is executed in the command-line interface.
You then need to hit Ctrl + Z to end scanning under Windows (Ctrl + D on a Mac).

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