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Author: felipexw

src/main/java/com/github/felipexw/classifiers/neighbors/SimpleKNNClassifier.java

@@ -136,22 +136,17 @@ protected void calculateFeatureSimilarities() {
     }
 
     protected List<Neighbor> getNeighborsWithDistanceFromARootNeighboor(Neighbor neighbor, int threshold) {
-
-
-//        LabeledInstance<Double, String> t = new LabeledInstance<>("2");
-
-
         Neighbor nei = new Neighbor(null, 0d, featureExtractor);
         List<Neighbor> neighbors = new ArrayList<>();
 
         LabeledInstance instance = neighbor.getInstance();
 
         for (int j = -1; j < instances.size() - 1; j++) {
             LabeledInstance neighborInstance = instances.get(j + 1);
-//            double similarity = similarityCalculator.calculate(instance.getFeatures(), neighborInstance.getFeatures());
-            double similarity = 0d;
+            double similarity = similarityCalculator.calculate(instance.getFeatures(), neighborInstance.getFeatures());
             Neighbor neighborRoot = new Neighbor(neighborInstance, similarity, new DoubleFeatureExtractor());
             neighbors.add(neighborRoot);
+
             if (neighbors.size() == threshold)
                 return neighbors;
         }

src/main/java/com/github/felipexw/evaluations/metrics/ChebyshevSimilarityCalculator.java

@@ -1,11 +1,13 @@
 package com.github.felipexw.evaluations.metrics;
 
+import java.util.List;
+
 /**
  * Created by felipe.appio on 30/08/2016.
  */
 public class ChebyshevSimilarityCalculator implements  SimilarityCalculator{
     @Override
-    public double calculate(double[] a, double[] b) {
+    public double calculate(List<Double> a, List<Double> b) {
         return 0;
     }
 }

src/main/java/com/github/felipexw/evaluations/metrics/CosineSimilarityCalculator.java

@@ -1,22 +1,24 @@
 package com.github.felipexw.evaluations.metrics;
 
+import java.util.List;
+
 /**
  * Created by felipe.appio on 25/08/2016.
  */
 public class CosineSimilarityCalculator implements SimilarityCalculator{
     @Override
-    public double calculate(double[] a, double[] b) {
-        if (a == null || b == null || (a.length != b.length))
-            throw new IllegalArgumentException("args can't be invalid");
+    public double calculate(List<Double> a, List<Double> b) {
+        if (a == null || a.isEmpty() || (a.size()!= b.size()))
+            throw new IllegalArgumentException("The params can't be null or empty.");
 
         double numerator = 0d;
         double denominator = 0d;
         double aFeatures = 0d;
         double bFeatures = 0d;
 
-        for(int i =0; i < a.length; i++){
-            numerator += a[i] * b[i];
-            denominator += (Math.pow(a[i], 2)) * (Math.pow(b[i], 2));
+        for(int i =0; i < a.size(); i++){
+            numerator += a.get(i) * b.get(i);
+            denominator += (Math.pow(a.get(i), 2)) * (Math.pow(a.get(i), 2));
         }
 
 //        denominator = (Math.sqrt(aFeatures)) * (Math.sqrt(bFeatures));