Command Line in R code

Question

Let me start by saying I am new to programming.

I am hoping to run a python script from the command line within an R script. I am running windows xp but also have a machine that runs Windows 7. I can run the following code without error for the dos-prompt.

cd C:\Documents and Settings\USER\workspace\UGA - Website
python test1.py

I have tried all sorts of different attempts in R using ?system, but am hoping someone can point me to what I am doing wrong. For example, here is just one attempt (it was recommended to use absolute paths)

cmd.1 <- shQuote("C:Python26/python.exe C:/Documents and Settings/USER/Desktop/UGA New Website", type="cmd")
system(cmd.1)

Any guidance will be very much appreciated

@Bitbert3: Not tested, but I think since your target path contains spaces you also need to quote that. — Richie Cotton
– Richie Cotton, Commented Jul 20, 2010 at 13:05

Btibert3 · Accepted Answer · 2010-07-26 15:19:34Z

2

Thanks for the help everyone. My issue was a combination of things, but this chunk of code worked.

shell(paste("python", shQuote("C:\\Documents and Settings\\USER\\Desktop\\UGA New Website\\metrics_get.py")))

Many thanks

edited Jul 26, 2010 at 15:19

answered Jul 20, 2010 at 19:55

Btibert3

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John Howard · Accepted Answer · 2010-07-19 21:29:13Z

1

Add a / after C:, which would make it look like this:

cmd.1 <- shQuote("C:Python26/python.exe C:/Documents and Settings/USER/Desktop/UGA New Website", type="cmd")
system(cmd.1)

answered Jul 19, 2010 at 21:29

John Howard

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Richie Cotton · Accepted Answer · 2010-07-20 13:09:07Z

1

Not tested but try this:

cmd.1 <- shQuote('C:\\Python26\\python.exe "C:\\Documents and Settings\\USER\\Desktop\\UGA New Website"', type="cmd")
system(cmd.1)

If this doesn't work, try variations on \, \\ and /, and where you put your quotes.

You could also try a system cd command to change the directory, so you don't need an absolute path.

answered Jul 20, 2010 at 13:09

Richie Cotton

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