Change "dummy" expressions to data set name.

Refs #495

Author: mikekucera

EnrichmentMapPlugin/src/main/java/org/baderlab/csplugins/enrichmentmap/task/CreateDummyExpressionTask.java

@@ -23,7 +23,7 @@
  */
 public class CreateDummyExpressionTask extends AbstractTask {
 
-	public static final float DEFAULT_VAL = 0.25f;
+	public static final float DEFAULT_VAL = 1f;
 
 	private final EMDataSet dataset;
 
@@ -35,7 +35,7 @@ public CreateDummyExpressionTask(EMDataSet dataset) {
 	private void createDummyExpression() throws IOException {
 		EnrichmentMap map = dataset.getMap();
 		GeneExpressionMatrix expressionMatrix = new GeneExpressionMatrix();
-		expressionMatrix.setColumnNames(new String[] {"Name", "Description", "Dummy"});
+		expressionMatrix.setColumnNames(new String[] {"Name", "Description", dataset.getName() });
 		expressionMatrix.setNumConditions(3);
 
 		// Not worried too much about sharing dummy expressions as they don't use up very much space.