[DL-Learner SVN] SF.net SVN: dl-learner:[3472] trunk/components-core/src/main/java/org/ dllearner

[<lor...@us...>]

Revision: 3472
          http://dl-learner.svn.sourceforge.net/dl-learner/?rev=3472&view=rev
Author:   lorenz_b
Date:     2011-12-05 13:08:51 +0000 (Mon, 05 Dec 2011)
Log Message:
-----------
Small improvement.

Modified Paths:
--------------
    trunk/components-core/src/main/java/org/dllearner/algorithms/DisjointClassesLearner.java
    trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java

Modified: trunk/components-core/src/main/java/org/dllearner/algorithms/DisjointClassesLearner.java
===================================================================
--- trunk/components-core/src/main/java/org/dllearner/algorithms/DisjointClassesLearner.java	2011-12-05 09:42:14 UTC (rev 3471)
+++ trunk/components-core/src/main/java/org/dllearner/algorithms/DisjointClassesLearner.java	2011-12-05 13:08:51 UTC (rev 3472)
@@ -241,7 +241,10 @@
 		}
 		for(NamedClass cls : completeDisjointclasses){
 			if(useClassPopularity){
-				double[] confidenceInterval = Heuristics.getConfidenceInterval95Wald(reasoner.getIndividualsCount(cls), 0);
+				int popularity = reasoner.getIndividualsCount(cls);
+				//we skip classes with no instances
+				if(popularity == 0) continue;
+				double[] confidenceInterval = Heuristics.getConfidenceInterval95Wald(popularity, 0);
 				double accuracy = (confidenceInterval[0] + confidenceInterval[1]) / 2;
 				evalDesc = new EvaluatedDescription(cls, new AxiomScore(1- accuracy));
 			} else {
@@ -276,7 +279,7 @@
 	public static void main(String[] args) throws Exception{
 		DisjointClassesLearner l = new DisjointClassesLearner(new SparqlEndpointKS(new SparqlEndpoint(new URL("http://dbpedia.aksw.org:8902/sparql"),
 				Collections.singletonList("http://dbpedia.org"), Collections.<String>emptyList())));
-		l.setClassToDescribe(new NamedClass("http://dbpedia.org/ontology/SoccerClub"));
+		l.setClassToDescribe(new NamedClass("http://dbpedia.org/ontology/Band"));
 		l.init();
 		l.getReasoner().prepareSubsumptionHierarchy();
 //		System.out.println(l.getReasoner().getClassHierarchy().getSubClasses(new NamedClass("http://dbpedia.org/ontology/Athlete"), false));System.exit(0);

Modified: trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java
===================================================================
--- trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java	2011-12-05 09:42:14 UTC (rev 3471)
+++ trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java	2011-12-05 13:08:51 UTC (rev 3472)
@@ -571,7 +571,7 @@
 	
 	public int getIndividualsCount(NamedClass nc){
 		String query = String.format("SELECT COUNT(?s) WHERE {" +
-				"?s a ?type." +
+				"?s a <%s>." +
 				"}", 
 				nc.getURI());
 		ResultSet rs = executeSelectQuery(query);

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