[R] Import R-output into Java

[Romain Francois]

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