Find closest centroids

ex7/findClosestCentroids.m

@@ -21,11 +21,20 @@ idx = zeros(size(X,1), 1);
 % Note: You can use a for-loop over the examples to compute this.
 %
 
+for i = 1:size(X,1)
 
+  idx(i) = 0;  % unassigned yet
+  best_distance = Inf;
 
+  for k = 1:K
+    distance = norm(X(i,:) - centroids(k,:))^2;
+    if distance < best_distance
+      idx(i) = k;
+      best_distance = distance;
+    end
+  end
 
-
-
+end
 
 % =============================================================