diff --git a/src/main/java/fr/univlille/sae/classification/view/DataVisualizationView.java b/src/main/java/fr/univlille/sae/classification/view/DataVisualizationView.java
index 8c1317b6b4c1b28511852ee37b37d6e2840f3809..488404c1eeafdb4a97365d4df0f802388d776760 100644
--- a/src/main/java/fr/univlille/sae/classification/view/DataVisualizationView.java
+++ b/src/main/java/fr/univlille/sae/classification/view/DataVisualizationView.java
@@ -42,6 +42,7 @@ public abstract class DataVisualizationView {
     protected DataVisualizationView(ClassificationModel model) {
         this.serieList = new HashMap<String, ScatterChart.Series<Double, Double>>();
         this.model = model;
+        this.series4 = new XYChart.Series();
     }
 
     /**