[R] Passing data among multiple instances

[Greg Snow]

Look at the nws package, it has tools for passing data among multiple instances of R (and waiting for data to be ready).

There are other packages that provide some of the same, but from what I remember, nws was fairly simple to set up on a single computer.

Hope this helps,

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Feng Li
> Sent: Wednesday, February 04, 2009 7:08 AM
> To: r-help at r-project.org
> Subject: [R] Passing data among multiple instances
> 
> Dear R,
> 
> I have two R instances running at the same time, say instance A and
> instance
> B. Is there a simpler way to pass the data in A to B?
> 
> More precise, I have a stupid example:
> 
> In instance A, I am running a function "test1"
> 
> test1 <- function (x1)
> {
>      x2 <- sin(x1)
>      return(x2)
> }
> 
> In instance B, another function "test2"
> 
> test2 <- function (x2)
> {
>      x3 <- cos(x2)
>      return(x3)
> }
> 
> where " test2" receives the input from "test1"'s rueslt.  "test1" and
> "test2" could be much more complex. They may take one minute each.
> 
> Now the whole procedure is instance A is running, while instance B is
> waiting for the result of instance A. Once instance A is done (instance
> A
> goes to run with new data), instance B should detect A is done, and
> instance
> B receives the parameter from instance A. B begins to work. While B is
> done,
> waiting for A's new results.
> 
> I want to repeat the loop many times and get x3 in the end.
> 
> 
> Is it possible to do this job? Thanks !
> 
> 
> Feng
> 
> 	[[alternative HTML version deleted]]
> 
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