From c0a1b01b4ffd7a14469b60cb09c3f09607f98edd Mon Sep 17 00:00:00 2001
From: Jurgen Van Gael <jurgen.vangael@gmail.com>
Date: Wed, 27 Jan 2010 23:37:47 +0800
Subject: [PATCH] Dense matrix scalar multiplication optimization.

---
 src/Numerics/LinearAlgebra/Double/DenseMatrix.cs       | 9 +++++++++
 src/Numerics/LinearAlgebra/Double/Matrix.Arithmetic.cs | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
index d5294bc6..caeac622 100644
--- a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
+++ b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
@@ -283,6 +283,15 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             Control.LinearAlgebraProvider.SubtractArrays(Data, other.Data, Data);
         }
 
+        /// <summary>
+        /// Multiplies each element of this matrix with a scalar.
+        /// </summary>
+        /// <param name="scalar">The scalar to multiply with.</param>
+        public override void Multiply(double scalar)
+        {
+            Control.LinearAlgebraProvider.ScaleArray(scalar, Data);
+        }
+
         /// <summary>
         /// Multiplies this dense matrix with another dense matrix and places the results into the result dense matrix.
         /// </summary>
diff --git a/src/Numerics/LinearAlgebra/Double/Matrix.Arithmetic.cs b/src/Numerics/LinearAlgebra/Double/Matrix.Arithmetic.cs
index b27cfdaf..fa98bba6 100644
--- a/src/Numerics/LinearAlgebra/Double/Matrix.Arithmetic.cs
+++ b/src/Numerics/LinearAlgebra/Double/Matrix.Arithmetic.cs
@@ -97,6 +97,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
                     }
                 });
         }
+
         /// <summary>
         /// Multiplies each element of this matrix with a scalar.
         /// </summary>