关闭从 R 启动的外部应用程序 [英] Close external application launched from R

问题描述

是否可以关闭从 R 中启动的应用程序?

Is it possible to close an application that was launched from within R?

假设我打开了一个 CSV 文件 my_file.csv 及其关联的应用程序 通过 shell.exec 函数.然后我想关闭这个应用程序.

Assume that I have opened a CSV file my_file.csv with its associated application via the shell.exec function. I then want to close this application.

推荐答案

由于 R 无法控制其他程序，因此您无法可靠地直接关闭在没有 R 的情况下打开的文件.您甚至不知道要关闭哪个程序.例如.在一台电脑上用记事本打开csv文件，在另一台电脑上用Excel打开.

Since R has no control over other programs you cannot directly close files opended without R reliably. You do not even know which program to close. E.g. one one computer a csv file may be opened with notepad, on another computer it may be opened with Excel.

如果您知道该程序，您可以使用 system2() 或类似的命令来执行一个命令来杀死另一个程序.例如.如果要关闭 Excel，请执行 system2("taskkill", args = "/im excel.exe").请注意，这将关闭程序/Excel 的所有打开实例，而不仅仅是特定的实例.

If you know the program you can use system2() or similar commands to execute a command to kill the other program. E.g. if you want to close Excel execute system2("taskkill", args = "/im excel.exe"). Note that this will close all open instances of the program/Excel, not jut a specific one.

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