/*
* Carrot2 project.
*
* Copyright (C) 2002-2014, Dawid Weiss, Stanisław Osiński.
* All rights reserved.
*
* Refer to the full license file "carrot2.LICENSE"
* in the root folder of the repository checkout or at:
* http://www.carrot2.org/carrot2.LICENSE
*/
package org.carrot2.examples.clustering;
import java.util.HashMap;
import java.util.Map;
import org.carrot2.clustering.lingo.LingoClusteringAlgorithm;
import org.carrot2.clustering.lingo.LingoClusteringAlgorithmDescriptor;
import org.carrot2.clustering.lingo.LingoClusteringAlgorithmDescriptor.AttributeBuilder;
import org.carrot2.core.*;
import org.carrot2.core.attribute.CommonAttributesDescriptor;
import org.carrot2.examples.ConsoleFormatter;
import org.carrot2.matrix.factorization.LocalNonnegativeMatrixFactorizationFactory;
import org.carrot2.source.pubmed.PubMedDocumentSource;
/**
* This example shows how to cluster {@link Document}s retrieved from
* {@link PubMedDocumentSource}
*
* @see ClusteringDocumentList
* @see UsingCachingController
*/
public class ClusteringDataFromPubMed
{
public static void main(String [] args)
{
/*
* For this example we use the SimpleController, which does not perform any
* caching. If you need to cache documents, clusters or Carrot2 component
* instances, please see the CachingController example.
*/
final Controller controller = ControllerFactory.createSimple();
Map<String, Object> attributes = new HashMap<String, Object>();
/*
* Search attributes.
*/
CommonAttributesDescriptor
.attributeBuilder(attributes)
.query("heart")
.results(100);
/*
* Optionally, you can also pass some attributes for the clustering algorithm. See
* http://download.carrot2.org/head/manual/#section.component.lingo for a full
* list.
*/
AttributeBuilder builder = LingoClusteringAlgorithmDescriptor.attributeBuilder(attributes);
builder.matrixReducer().factorizationFactory(LocalNonnegativeMatrixFactorizationFactory.class);
builder.matrixBuilder().titleWordsBoost(7);
ProcessingResult result = controller.process(attributes,
PubMedDocumentSource.class, LingoClusteringAlgorithm.class);
ConsoleFormatter.displayResults(result);
}
}