[R] Import R-output into Java

[Maxl18]

Thanks,
now it works!

Max



Romain Francois-2 wrote:
> 
> 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
> 
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> 
> 

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