"[SOLVED] Problems with Set Role and ECODB in Java Code"

DGSunicanDGSunican MemberPosts:2Contributor I
edited June 2019 inHelp
Hello all,

I am having a problem integrating RapidMiner in my Java Code. I am using 5.3.013 version.

What i want to do is the next process:
1. Read a Weak .arff file.
2. Set as label the last nominal attribute, named "note"
3. Apply the ECODB algorithm in order to detect class-outliers
4. Save the resulting set, with the instances marked as outliers, in a new .arff file

Following the documentation in the RapidMiner Wiki, i have implement the following Java method to perform the mentioned steps:
尝试{
//initialized RapidMiner
RapidMiner.init();

} catch(Exception e){System.out.println("Exception initializating Rapidminer, method RapidMiner.init(): "+e);}

/*
* Creates a new process. This process will contain the
* whole sequence of reading the .arff Weka file, making the
* outlier instances and finally saving the .arff Weka file with
* the marked instances
*/
com.rapidminer.Process outlierProcess = new com.rapidminer.Process();

尝试{
//Operator for reading the .arff Weka file
Operator initialDatasetECODB =
OperatorService.createOperator(com.rapidminer.operator.io.ArffExampleSource.class);

//Operator to perform EDOCB algorithm
Operator ecodb =
OperatorService.createOperator(com.rapidminer.operator.preprocessing.outlier.EcodbOperator.class);

//Operator for saving the markedDataset
Operator markedDatasetECODB =
OperatorService.createOperator(com.rapidminer.operator.io.ArffExampleSetWriter.class);

//Operator for labeling the initial dataset
Operator labeling =
OperatorService.createOperator(
com.rapidminer.operator.preprocessing.filter.ChangeAttributeRole.class);


//Configures the "read arff" operator to read the dataset file with ID assigned per instance
initialDatasetECODB.setParameter(
com.rapidminer.operator.io.ArffExampleSource.PARAMETER_DATA_FILE,
//this.directorio.getAbsolutePath()+"\\originalDataSet.arff");
"C:/originalDataSet.arff");


//Configures the ECODB operator
ecodb.setParameter(
com.rapidminer.operator.preprocessing.outlier.EcodbOperator.PARAMETER_NUMBER_OF_NEIGHBORS,
""+this.k+"");
ecodb.setParameter(
com.rapidminer.operator.preprocessing.outlier.EcodbOperator.PARAMETER_NUMBER_OF_Class_OUTLIERS,
""+this.numOutliers+"");

//Configures the operator to save the marked dataset
markedDatasetECODB.setParameter (com.rapidminer.operator.io.ArffExampleSetWriter.PARAMETER_EXAMPLE_SET_FILE,
this.directorio.getAbsolutePath()+"\\markedDataset.arff");

//Configures the operator for labeling the initial dataset
labeling.setParameter(
com.rapidminer.operator.preprocessing.filter.ChangeAttributeRole.PARAMETER_TARGET_ROLE,
Attributes.LABEL_NAME);
labeling.setParameter(
com.rapidminer.operator.preprocessing.filter.ChangeAttributeRole.PARAMETER_NAME,
"note");

//Adds the operators to the process
outlierProcess.getRootOperator().getSubprocess(0).addOperator(initialDatasetECODB);
outlierProcess.getRootOperator().getSubprocess(0).addOperator(ecodb);
outlierProcess.getRootOperator().getSubprocess(0).addOperator(markedDatasetECODB);
outlierProcess.getRootOperator().getSubprocess(0).addOperator(labeling);




//Conects the reader operator to the ecodb operator
尝试{
initialDatasetECODB.getOutputPorts().getPortByName("output")
.connectTo(labeling.getInputPorts().getPortByName("example set input"));
}catch(Exception e){System.out.println("Error in initialDataset operator");}
尝试{
labeling.getOutputPorts().getPortByName("example set output")
.connectTo(ecodb.getInputPorts().getPortByName("example set input"));

}catch(Exception e){System.out.println("Error in labeling operator: "+e);}
尝试{
ecodb.getOutputPorts().getPortByName("example set output")
.connectTo(markedDatasetECODB.getInputPorts().getPortByName("input"));
}catch(Exception e){System.out.println("Error in ecodb operator");}

//Run the whole process
outlierProcess.run();

}catch (Exception e){ System.out.println("Exception trying to execute the ECODB RapidMiner process "+e);}
When i execute it, i get the following Exception:
Exception trying to execute the ECODB RapidMiner process com.rapidminer.operator.UserError: No data was delivered at port Detect Outlier (COF).example set input (connected).
It seems that the output port of the Set_Role class, "Example output set", do not return nothing. I have tried to connect, directly, the ECODB class to the readArff class, and they seems to connect correctly, but of course ECODB launch en exception requiering to stablish a label attribute, and it only can be done with the Set_Role operation, which do not work correctly.

I hope someone in this forum could help me with this issue.

Thank you very much.


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Answers

  • Marco_BoeckMarco_Boeck Administrator, Moderator, Employee, Member, University ProfessorPosts:1,984RM Engineering
    Hi,

    Please have a look at the sticky thread in the development forum:http://rapid-i.com/rapidforum/index.php/topic,5807.0.html

    What I always recommend is to not create your own process by hand (i.e. don't create operators yourself) but to rather use a predefined process which has been created via RM Studio GUI. That makes things A LOT less prone to errors.

    Regards,
    Marco
  • DGSunicanDGSunican MemberPosts:2Contributor I
    Marco Boeck wrote:

    Hi,

    Please have a look at the sticky thread in the development forum:http://rapid-i.com/rapidforum/index.php/topic,5807.0.html

    What I always recommend is to not create your own process by hand (i.e. don't create operators yourself) but to rather use a predefined process which has been created via RM Studio GUI. That makes things A LOT less prone to errors.

    Regards,
    Marco

    Thank you so much Marco, it worked for me. Problem solved!
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