vector: added creatematrix method

src/Numerics/LinearAlgebra/Double/DenseVector.cs

@@ -31,8 +31,6 @@ namespace MathNet.Numerics.LinearAlgebra.Double
     using System;
     using System.Collections.Generic;
     using System.Globalization;
-    using Algorithms;
-    using Algorithms.LinearAlgebra;
     using NumberTheory;
     using Properties;
     using Threading;
@@ -159,7 +157,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// </returns>
         public override Matrix CreateMatrix(int rows, int columns)
         {
-            throw new NotImplementedException();
+            return new DenseMatrix(rows, columns);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Double/Vector.cs

@@ -684,7 +684,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
 
         #endregion
 
-        #region Coping and Conversion
+        #region Copying and Conversion
         /// <summary>
         /// Returns a deep-copy clone of the vector.
         /// </summary>

src/UnitTests/LinearAlgebraTests/Double/DenseVectorTests.cs

@@ -37,5 +37,15 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Double
             vector[0] = 100.0;
             Assert.AreEqual(100.0, data[0]);
         }
+
+        [Test]
+        [MultipleAsserts]
+        public void CanCreateMatrix()
+        {
+            var vector = new DenseVector(3);
+            var matrix = vector.CreateMatrix(2, 3);
+            Assert.AreEqual(2, matrix.RowCount);
+            Assert.AreEqual(3, matrix.ColumnCount);
+        }
     }
 }