Questions about Rserve typically go to this mailing list:
http://mailman.rz.uni-augsburg.de/mailman/listinfo/stats-rosuda-devel
Le 20/08/10 06:25, Donald Paul Winston a écrit :
REXP has an asBytes() method. Will this capture the output of an R plot
function if a proper graphics device is used? It appears R insists on
sending plot output to a file. Kind of strange since it insists on loading
all your data into memory before it can do anything.
If so then does anyone know what this would be? I prefer png or jpeg.
Example:
c is an RConnection
REXP r = c.eval("png(......); plot(1:25, cex=2, pch=c(1:25))");
Then I can write the r.asBytes() to an output stream.
(I think I already know the answer to this, just hoping I'm wrong)
"r" will be NULL. Before you do it over Rserve, try to do it in R :
> x <- plot(1:25, cex=2, pch=c(1:25))
> x
NULL
What you can do is close the device (calling dev.off()), and then send
the file accross the wire. Rserve has some methods for file transfer.
For example, see :
http://romainfrancois.blog.free.fr/index.php?post/2009/08/04/Transfer-files-through-Rserve
Romain
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Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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