Also print the perAngle polar speed regression functions

java/com.sap.sailing.polars/src/com/sap/sailing/polars/PolarDataService.java

@@ -194,5 +194,19 @@ public interface PolarDataService {
      */
     PolynomialFunction getAngleRegressionFunction(BoatClass boatClass, LegType legType, Tack tack) throws NotEnoughDataHasBeenAddedException;
 
+    /**
+     * This method is not intended to be used directly apart from debugging purposes. If you intend to use the polar service please 
+     * use {@link #getSpeed(BoatClass, Speed, Bearing)}.
+     * 
+     * @param boatClass
+     * @param trueWindAngle
+     * @return The estimating function for the true wind angle estimating boatspeed over windspeed for the
+     *         given boat class. All values in kn.
+     * @throws NotEnoughDataHasBeenAddedException
+     */
+    PolynomialFunction getSpeedRegressionFunction(BoatClass boatClass, double trueWindAngle) throws NotEnoughDataHasBeenAddedException;
+    
     void raceFinishedLoading(TrackedRace race);
+
+
 }

java/com.sap.sailing.polars/src/com/sap/sailing/polars/impl/PolarDataServiceImpl.java

@@ -146,9 +146,16 @@ public class PolarDataServiceImpl implements PolarDataService {
             throws NotEnoughDataHasBeenAddedException {
         return polarDataMiner.getAngleRegressionFunction(boatClass, legType, tack);
     }
+    
+    @Override
+    public PolynomialFunction getSpeedRegressionFunction(BoatClass boatClass, double trueWindAngle)
+            throws NotEnoughDataHasBeenAddedException {
+        return polarDataMiner.getSpeedRegressionFunction(boatClass, trueWindAngle);
+    }
 
     @Override
     public void raceFinishedLoading(TrackedRace race) {
         polarDataMiner.raceFinishedTracking(race);
     }
+
 }

java/com.sap.sailing.polars/src/com/sap/sailing/polars/mining/PolarDataMiner.java

@@ -410,6 +410,11 @@ public class PolarDataMiner {
             throws NotEnoughDataHasBeenAddedException {
         return cubicRegressionPerCourseProcessor.getAngleRegressionFunction(boatClass, legType, tack);
     }
+    
+    public PolynomialFunction getSpeedRegressionFunction(BoatClass boatClass, double trueWindAngle)
+            throws NotEnoughDataHasBeenAddedException {
+        return speedRegressionPerAngleClusterProcessor.getSpeedRegressionFunction(boatClass, trueWindAngle);
+    }
 
     public void raceFinishedTracking(TrackedRace race) {
         Set<GPSFixMovingWithOriginInfo> fixes = null;

java/com.sap.sailing.polars/src/com/sap/sailing/polars/mining/SpeedRegressionPerAngleClusterProcessor.java

@@ -4,6 +4,8 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.logging.Logger;
 
+import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
+
 import com.sap.sailing.domain.base.BoatClass;
 import com.sap.sailing.domain.base.SpeedWithConfidence;
 import com.sap.sailing.domain.base.impl.SpeedWithConfidenceImpl;
@@ -102,8 +104,19 @@ private static final Logger logger = Logger.getLogger(CubicRegressionPerCoursePr
         logger.severe("Polar Data Mining Pipe failed.");
         throw new RuntimeException("Polar Data Miner failed.", failure);
     }
-
-
+    
+    public PolynomialFunction getSpeedRegressionFunction(BoatClass boatClass, double trueWindAngle)
+            throws NotEnoughDataHasBeenAddedException {
+        GroupKey key = createGroupKey(boatClass, new DegreeBearingImpl(trueWindAngle));
+        PolynomialFunction polynomialFunction;
+        if (regressions.containsKey(key)) {
+            polynomialFunction = regressions.get(key).getOrCreatePolynomialFunction();
+        } else {
+            throw new NotEnoughDataHasBeenAddedException();
+        }
+        return polynomialFunction;
+    }
+    
     @Override
     public Class<GroupedDataEntry<GPSFixMovingWithPolarContext>> getInputType() {
      // TODO Auto-generated method stub

java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/jaxrs/api/PolarResource.java

@@ -96,6 +96,14 @@ public class PolarResource extends AbstractSailingServerResource {
                     }
                 }
             }
+            for (double trueWindAngle = -177.5; trueWindAngle < 180; trueWindAngle = trueWindAngle + 5) {
+                try {
+                    PolynomialFunction speedForTWAFunction = polarDataService.getSpeedRegressionFunction(boatClass, trueWindAngle);
+                    stringBuilder.append("Speed for TWA: " + boatClass + " " + trueWindAngle + ": " + speedForTWAFunction.toString() + "\n");
+                } catch (NotEnoughDataHasBeenAddedException e) {
+                    stringBuilder.append("No data for " + boatClass + " " + trueWindAngle + "\n");
+                }
+            }
             stringBuilder.append("\n\n");
         }