Can R cause a file to be opened by another program?

Question

This is a bit of a strange question, but I thought people here might be interested.

Is it possible to have R cause a file to be opened in another program? For example, could you write a command line that would cause a music file to start playing? The potential application would be that after a model is finished running, music would start to play, alerting you to the model's completion.

Answer 1

In addition to system, on Windows at least you can use shell.exec which will open the file using the application specified in the Windows file associations. For example, shell.exec("file.txt") will open a text file in your favourite text editor, shell.exec("file.mp3") will launch a media player, etc.

Answer 2

There is audio package which allow to play wave files:

require(audio)
wave_file <- dir("C:/Windows/Media", pattern="\\.wav$", full.names=TRUE)[1] # some random windows wave file
f <- load.wave(wave_file)
play(f)

Answer 3

You can do this by calling the system() function.