That's brilliant!
Thanks a lot for your help,
Rainer
Simon Urbanek wrote:
> Rainer,
>
> On Oct 19, 2005, at 3:29 PM, Rainer M. Krug wrote:
>
>> when I use
>>
>> con1 <- socketConnection(...)
>>
>> in R and want to send text from another application written in Delphi
>> to R, do I just have to send the text or do I have to implement more
>> control characters and so on?
>
> Sockets are just reliable bi-directional communication channels (in the
> default mode), so their use is entirely up to you (both on R side and
> other application's side).
>
>> Is
>>
>> con1 <- socketConnection(port=6011, server=TRUE)
>> writeLines("plot(rnorm(100))", con1)
>>
>> just sending the text in "plot(rnorm(100))" to the socket or is it
>> doing more (R specific protocoll for socks comminication)?
>
> It basically equivalent to using "send" on the socket API level [i.e.
> the above effectively does send(s, "plot(rnorm(100))\n", 17, 0)], so
> it's up to the other side to receive it properly. There is no "R
> specific protocol" - socket connections in R use regular TCP (neither
> red nor white "socks" ;)), so the literature on socket programming is
> your friend (e.g. using readLines(con1) for incoming traffic in your
> example would be a bad idea).
>
> Cheers,
> Simon
>
--
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Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)
Department of Conservation Ecology
University of Stellenbosch
Matieland 7602
South Africa
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