[R] Problem Writeing a pipe using R (stdin is consumed)

[Huntsinger, Reid]

The named pipe idea works for me:

basically,

$ mknod to_R p

$ echo "test this out" > to_R &
$ R CMD BATCH rtest.R out

where rtest.R is

con <- fifo("to_R", open="r")
print(readlines(con))

Reid Huntsinger



-----Original Message-----
From: Alberto Gobbi [mailto:agobbi at anadyspharma.com]
Sent: Friday, February 21, 2003 2:52 PM
To: R-Help
Subject: RE: [R] Problem Writeing a pipe using R (stdin is consumed)


Thanks for the answer!
However what I would like to ba able to do is something like:
perl -e 'print "1 2\n\2 2\n";'  |  R --silent commandFile

and commandFile would contain something like:
t<-read.table(file("t"), sep=" ")
print(t*2)

This would need read.table to get the original stdin() and the commands to
be read from a file.

The idea with the named pipe does not work either for the same reasons.

Thanks again,
Alberto



-----Original Message-----
From: M.Kondrin [mailto:mkondrin at hppi.troitsk.ru]
Sent: Friday, February 21, 2003 21:43 PM
To: R-Help
Subject: Re: [R] Problem Writeing a pipe using R (stdin is consumed)


M.Kondrin wrote:
> May be R -slave ... will help?
> man R
> ...
>        -q, --quiet
>               Don't print startup message
> 
>        --silent
>               Same as --quiet
> 
>        --slave
>               Make R run as quietly as possible
> 
> ...
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> http://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 

$ echo "h<-1; print(h)" | R --slave
[1] 1

$

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