Import R-output into Java

Ooops, I meant this :

con.voidEval("sink('test.txt')");
con.voidEval("cat(1+1)");
con.voidEval("sink()");

Romain Francois wrote:

Hi,

try this instead:

con.voidEval("sink(test.txt)");
con.voidEval("cat(1+1)");
con.voidEval("sink()");

Romain

Maxl18 wrote:

Thanks, sink was exactly the function I searched.
It properly works in R, but when I try to launch it from Java, the 
file is
created but never written any output...

con.voidEval("test.txt");   // file is created
con.voidEval("1+1");        // nothing is written into the file
con.voidEval("sink()");

Where is my mistake?
Cheers, Max





Thomas Roth (geb. Kaliwe) wrote:
 

#I used sink
?sink


#Thomas



Maxl18 schrieb:
   

Hello,
I want to import R-output via Rserve to Java, especially for the 
function
ctree from the package party.
Rserve is working properly.

Yet, I only get the predictions with the Java code

   try{
       RConnection c = new RConnection();
       ...
       c.voidEval("modell <- ctree(...)");
       REXP y = c.eval("nodes(modell,1)[[1]]$prediction");
       ...
   }catch(Exception e){}

When I try to get the whole text with

   REXP z = c.eval("nodes(modell,1)[[1]]");
   System.out.println(z);

I get something like   
org.rosuda.REngine.REXPGenericVector at 119c082+[10]named

But I want the text which is printed in R.

What can I do?
Thanks, Max


Once again:
It`s clear to get the result in R but I don`t know hoe to get the
R-output
into Java (or into a file, i.e. .txt)
      

-- 
Romain Francois
Independent R Consultant
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr