Modify the comments about LabeledPoint

examples/src/main/java/org/apache/spark/examples/mllib/JavaHypothesisTestingExample.java

@@ -67,7 +67,7 @@ public static void main(String[] args) {
       )
     );
 
-    // The contingency table is constructed from the raw (feature, label) pairs and used to conduct
+    // The contingency table is constructed from the raw (label, feature) pairs and used to conduct
     // the independence test. Returns an array containing the ChiSquaredTestResult for every feature
     // against the label.
     ChiSqTestResult[] featureTestResults = Statistics.chiSqTest(obs.rdd());

examples/src/main/python/mllib/hypothesis_testing_example.py

@@ -51,7 +51,7 @@
         [LabeledPoint(1.0, [1.0, 0.0, 3.0]),
          LabeledPoint(1.0, [1.0, 2.0, 0.0]),
          LabeledPoint(1.0, [-1.0, 0.0, -0.5])]
-    )  # LabeledPoint(feature, label)
+    )  # LabeledPoint(label, feature)
 
     # The contingency table is constructed from an RDD of LabeledPoint and used to conduct
     # the independence test. Returns an array containing the ChiSquaredTestResult for every feature

examples/src/main/scala/org/apache/spark/examples/mllib/HypothesisTestingExample.scala

@@ -61,9 +61,9 @@ object HypothesisTestingExample {
           LabeledPoint(-1.0, Vectors.dense(-1.0, 0.0, -0.5)
           )
         )
-      ) // (feature, label) pairs.
+      ) // (label, feature) pairs.
 
-    // The contingency table is constructed from the raw (feature, label) pairs and used to conduct
+    // The contingency table is constructed from the raw (label, feature) pairs and used to conduct
     // the independence test. Returns an array containing the ChiSquaredTestResult for every feature
     // against the label.
     val featureTestResults: Array[ChiSqTestResult] = Statistics.chiSqTest(obs)