--- a/artifacts/src/main/java/org/dive4elements/river/jfree/StableXYDifferenceRenderer.java	Fri Jun 05 16:56:47 2015 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/jfree/StableXYDifferenceRenderer.java	Mon Jun 08 16:53:54 2015 +0200
@@ -621,6 +621,31 @@
         return false;
     }
 
+    protected static boolean hasNaN(XYDataset dataset) {
+        int N = dataset.getItemCount(0);
+        int M = dataset.getItemCount(1);
+
+        int i = 0, j = 0;
+        boolean haveNaN = false;
+        for (; i < N; ++i) {
+            double x = dataset.getXValue(0, i);
+            double y = dataset.getYValue(0, i);
+            if (Double.isNaN(x) || Double.isNaN(y)) {
+                return true;
+            }
+        }
+
+        for (; j < M; ++j) {
+            double x = dataset.getXValue(1, j);
+            double y = dataset.getYValue(1, j);
+            if (Double.isNaN(x) || Double.isNaN(y)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+
     protected static List<XYDataset> splitByNaNsTwoSeries(
         XYDataset dataset
     ) {
@@ -628,6 +653,11 @@
 
         List<XYDataset> datasets = new ArrayList<XYDataset>();
 
+        if (!hasNaN(dataset)) {
+            datasets.add(dataset);
+            return datasets;
+        }
+
         int N = dataset.getItemCount(0);
         int M = dataset.getItemCount(1);
 
@@ -846,9 +876,44 @@
             log.debug("datasets after split: " + datasets.size());
         }
 
+        /*
+        log.debug("Begin dump datasets: ");
+        log.debug("Original");
+        i=0;
+        dumpDataset(dataset, "Original" );
+        for (XYDataset set: datasets) {
+            dumpDataset(dataset, "New: " + i++);
+        }
+        log.debug("End dump datasets: ");
+        */
+
         return datasets;
     }
 
+    /*
+    public static void dumpDataset(XYDataset dataset, String msg) {
+        log.debug("Begin dump Dataset: " + msg);
+
+        int N = dataset.getItemCount(0);
+        int M = dataset.getItemCount(1);
+
+        int i = 0, j = 0;
+        for (; i < N; ++i) {
+            double x = dataset.getXValue(0, i);
+            double y = dataset.getYValue(0, i);
+            log.debug("0 " + i + " X: "+ x + "Y: "+ y);
+        }
+
+        for (; j < M; ++j) {
+            double x = dataset.getXValue(1, j);
+            double y = dataset.getYValue(1, j);
+            log.debug("1 " + i + " X: "+ x + "Y: "+ y);
+        }
+        log.debug("End dump Dataset: " + msg);
+    }
+    */
+
+
     public static List<XYDataset> splitByNaNs(XYDataset dataset)  {
 
         switch (dataset.getSeriesCount()) {