From 5b23c51e0f2c1e0b4360f8bbf8e59ad50e8c0306 Mon Sep 17 00:00:00 2001
From: Jose Manuel Abuin Mosquera <abuinjm@gmail.com>
Date: Thu, 2 Jun 2016 17:28:26 +0200
Subject: [PATCH] Added dot vector operation for the class DenseVector

---
 .../org/apache/spark/ml/linalg/Vectors.scala    | 16 ++++++++++++++++
 .../org/apache/spark/mllib/linalg/Vectors.scala | 17 +++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Vectors.scala b/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Vectors.scala
index 909fec1c06653..006048ea0cdfe 100644
--- a/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Vectors.scala
+++ b/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Vectors.scala
@@ -537,6 +537,22 @@ class DenseVector @Since("2.0.0") ( @Since("2.0.0") val values: Array[Double]) e
       maxIdx
     }
   }
+  
+  /**
+ * Function that returns the result of multiply this DenseVector by another DenseVector.
+ *
+ * @param other The second DenseVector
+ * @return The resulting Double value
+ */
+  def dot(other: DenseVector): Double = {
+    require(this.size == other.size, "DenseVectors dimmensions must be the same." +
+    s" You provided ${this.size} items and " +
+    s" ${other.size} items.")
+
+    return BLAS.dot(this,other)  
+    
+  }
+  
 }
 
 @Since("2.0.0")
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
index 02fd60da7d590..87f4891d3373d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
@@ -712,6 +712,23 @@ class DenseVector @Since("1.0.0") (
   override def asML: newlinalg.DenseVector = {
     new newlinalg.DenseVector(values)
   }
+  
+  /**
+ * Function that returns the result of multiply this DenseVector by another DenseVector.
+ *
+ * @param other The second DenseVector
+ * @return The resulting Double value
+ */
+  @Since("2.0.0")
+  def dot(other: DenseVector): Double = {
+    require(this.size == other.size, "DenseVectors dimmensions must be the same." +
+    s" You provided ${this.size} items and " +
+    s" ${other.size} items.")
+
+    return BLAS.dot(this,other)  
+    
+  }
+  
 }
 
 @Since("1.3.0")