--- a/artifacts/src/main/java/org/dive4elements/river/utils/DoubleUtil.java	Mon Mar 16 14:37:30 2015 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/utils/DoubleUtil.java	Mon Mar 16 15:36:38 2015 +0100
@@ -10,6 +10,13 @@
 
 import org.dive4elements.river.artifacts.math.Linear;
 
+import org.apache.commons.math.analysis.interpolation.LinearInterpolator;
+import org.apache.commons.math.analysis.polynomials.PolynomialSplineFunction;
+
+import org.apache.commons.math.exception.DimensionMismatchException;
+import org.apache.commons.math.exception.NumberIsTooSmallException;
+import org.apache.commons.math.exception.NonMonotonousSequenceException;
+
 import gnu.trove.TDoubleArrayList;
 
 import java.util.Arrays;
@@ -305,5 +312,23 @@
             }
         }
     }
+
+    /** Convieniance function for results to get an interpolator.
+     * This is basically a static wrapper to for LinearInterpolator.interpolate
+     * with error handling. Returns null on error.*/
+    public static PolynomialSplineFunction getLinearInterpolator(TDoubleArrayList x, TDoubleArrayList y) {
+        LinearInterpolator lpol = new LinearInterpolator();
+        try {
+            return lpol.interpolate(x.toNativeArray(), y.toNativeArray());
+        } catch (DimensionMismatchException e) {
+            log.error("KMs and Result values have different sizes. Failed to interpolate: " +
+                    e.getMessage());
+        } catch (NonMonotonousSequenceException e) {
+            log.error("KMs are not monotonous. Failed to interpolate: " + e.getMessage());
+        } catch (NumberIsTooSmallException e) {
+            log.error("Result is to small. Failed to interpolate: " + e.getMessage());
+        }
+        return null;
+    }
 }
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