[R] shelling out to R for one command

[David Firth]

On Saturday, Nov 16, 2002, Paul Meagher wrote:

> I am developing a PHP script and want to use R to get the probability  
> of a
> t-value.
>
> This just requires that I issue one R statement and output the result.
>
> The problem I am having is that R will accept batch input but I am not
> sure that it will accept a "one-liner" (i.e., "/usr/local/bin/R  
> qt(.975,
> 20)"  does not work but you get the idea).
>
> Is there a way to pass R a one-liner without having to put it into a  
> batch
> file and submit it to R as a batch job.
>
>

various possibilities for this using unix redirection
e.g.

david% echo "3+4" | R --slave
[1] 7

One could for example set this up as a shell script "Roneliner",
so that

david% Roneliner "3+4"
[1] 7

Possibly it's more economical also to use arguments
     --no-restore --no-save --no-readline --gui=none
in addition to --slave.

David


> Regards,
> Paul Meagher
>
>
>
>
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