[R] help with function "system" and MS-DOS command TYPE

From: Chen, Xiao <jingy1_at_ucla.edu>
Date: Wed 31 Jan 2007 - 04:23:13 GMT


Greetings -

I have a quick question that I hope someone will have a quick answer. I have tried to use the R function "system" with the MS-DOS command "type" to display the full content of a text file. But it always returns with a message saying the text file is not found. I could accomplish the same task with the "cat" command which is one of the unix-like commands that I have installed on my windows machine. But I would like to know how it would work with the "type" command.

Here is what I have tried:

> zz<-file("d:/work/test/test.txt", "w")
> cat("this is a test\n", file=zz)

> close(zz)
> system("cat test.txt", show.output.on.console=T)
this is a test
> system("type test.txt", show.output.on.console=T)
test.txt not found
>

Thanks much for any help that you could offer.

Best,

Xiao Chen
Statistical Consulting Group
UCLA Academic Technology Services
http://www.ats.ucla.edu/stat/



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