There is a video demo of exactly that on the data.table homepage : http://datatable.r-forge.r-project.org/ http://www.youtube.com/watch?v=rvT8XThGA8o
However, last time I looked, svSocket uses text transfer. It would be really great if it did binary serialization, like Rserve does. Previous threads : http://r.789695.n4.nabble.com/Using-svSocket-with-data-table-tp924554p924554.html http://r.789695.n4.nabble.com/Video-demo-of-using-svSocket-with-data-table-tp893671p893672.html This one contains a comparison of Rserve and svSocket : http://r.789695.n4.nabble.com/Fwd-Re-Video-demo-of-using-svSocket-with-data-table-tp903723p903723.html Best, Matthew "Philippe Grosjean" <phgrosj...@sciviews.org> wrote in message news:4c629ab7.60...@sciviews.org... > Hello, > > For non-blocking access to R through sockets, you should also look at > svSockets. It may be more appropriate than RServer for feeding data to R, > while you have another process running in R that do smething like updating > a graph, or some other calculations. > Best, > > Philippe Grosjean > > On 20/07/10 14:10, Martin Kerr wrote: >> >> Sorry I phrased that badly. >> What I'm trying to do is asynchronously add data to R, i.e. a program >> will periodically dump some readings to the Rserver and then later on >> another program will run some analysis scripts on them. >> I have managed to add the data via CMD_detachedVoidEval as you suggested. >> How exactly do I go about attaching to the session again? I know it >> involves some form of session key that comes back from the detach call, >> but what from does it take? And how do I use this? >> Thanks AgainMartin >>> Subject: Re: [Rd] Non-blocking Eval >>> From: simon.urba...@r-project.org >>> Date: Mon, 19 Jul 2010 11:34:29 -0400 >>> CC: r-devel@r-project.org >>> To: mk2...@hotmail.com >>> >>> On Jul 19, 2010, at 10:58 AM, Martin Kerr wrote: >>> >>>> >>>> Hello, >>>> I'm currently working with the C++ version of the Rserve Client as part >>>> of a student project. >>>> Is there an implementation of a non-blocking interface to Rserve in >>>> C++? I can find one via the Java JRI but no equivalent in C++. >>> >>> (Please note that stats-rosuda-devel is the correct list for this.) >>> >>> I'm not quite sure what you mean, because in JRI there is idleEval() >>> which is non-blocking in the sense that it doesn't do anything if R is >>> busy but that doesn't apply to Rserve as by definition R cannot be busy >>> there. There is no non-blocking interface to JRI - all calls are >>> synchronous. >>> >>> If your question is whether you can start an evaluation in Rserve and >>> not wait for the result then there is CMD_detachedVoidEval in Rserve, >>> but the C++ client only implements a subset of the API which does not >>> include that -- however, it is trivial to implement (just send a request >>> with CMD_detachedVoidEval as there is nothing to decode). >>> >>> Cheers, >>> Simon >>> >> _________________________________________________________________ >> >> Do you have a story that started on Hotmail? Tell us now >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel >> >> > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
