diff --git a/src/Numerics/LinearAlgebra/Generic/Matrix.cs b/src/Numerics/LinearAlgebra/Generic/Matrix.cs
index aae27d2b..94c0bd6f 100644
--- a/src/Numerics/LinearAlgebra/Generic/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Generic/Matrix.cs
@@ -798,45 +798,45 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
         }
 
         /// <summary>
-        /// Copies the values of the given array to the specified column.
+        /// Copies the values of the given Vector to the specified column.
         /// </summary>
         /// <param name="columnIndex">The column to copy the values to.</param>
-        /// <param name="column">The array to copy the values from.</param>
+        /// <param name="column">The vector to copy the values from.</param>
         /// <exception cref="ArgumentNullException">If <paramref name="column"/> is <see langword="null" />.</exception>
         /// <exception cref="ArgumentOutOfRangeException">If <paramref name="columnIndex"/> is less than zero,
         /// or greater than or equal to the number of columns.</exception>
         /// <exception cref="ArgumentException">If the size of <paramref name="column"/> does not
         /// equal the number of rows of this <strong>Matrix</strong>.</exception>
-        /// <exception cref="ArgumentException">If the size of <paramref name="column"/> does not
-        /// equal the number of rows of this <strong>Matrix</strong>.</exception>
-        public void SetColumn(int columnIndex, T[] column)
+        public void SetColumn(int columnIndex, Vector<T> column)
         {
             if (column == null)
             {
                 throw new ArgumentNullException("column");
             }
 
-            Storage.CopyColumnFrom(new DenseVectorStorage<T>(column.Length, column), columnIndex);
+            column.Storage.CopyToColumn(Storage, columnIndex);
         }
 
         /// <summary>
-        /// Copies the values of the given Vector to the specified column.
+        /// Copies the values of the given array to the specified column.
         /// </summary>
         /// <param name="columnIndex">The column to copy the values to.</param>
-        /// <param name="column">The vector to copy the values from.</param>
+        /// <param name="column">The array to copy the values from.</param>
         /// <exception cref="ArgumentNullException">If <paramref name="column"/> is <see langword="null" />.</exception>
         /// <exception cref="ArgumentOutOfRangeException">If <paramref name="columnIndex"/> is less than zero,
         /// or greater than or equal to the number of columns.</exception>
         /// <exception cref="ArgumentException">If the size of <paramref name="column"/> does not
         /// equal the number of rows of this <strong>Matrix</strong>.</exception>
-        public void SetColumn(int columnIndex, Vector<T> column)
+        /// <exception cref="ArgumentException">If the size of <paramref name="column"/> does not
+        /// equal the number of rows of this <strong>Matrix</strong>.</exception>
+        public void SetColumn(int columnIndex, T[] column)
         {
             if (column == null)
             {
                 throw new ArgumentNullException("column");
             }
 
-            Storage.CopyColumnFrom(column.Storage, columnIndex);
+            new DenseVectorStorage<T>(column.Length, column).CopyToColumn(Storage, columnIndex);
         }
 
         /// <summary>
@@ -899,7 +899,7 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
                 throw new ArgumentNullException("row");
             }
 
-            Storage.CopyRowFrom(row.Storage, rowIndex);
+            row.Storage.CopyToRow(Storage, rowIndex);
         }
 
         /// <summary>
@@ -919,7 +919,7 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
                 throw new ArgumentNullException("row");
             }
 
-            Storage.CopyRowFrom(new DenseVectorStorage<T>(row.Length, row), rowIndex);
+            new DenseVectorStorage<T>(row.Length, row).CopyToRow(Storage, rowIndex);
         }
 
         /// <summary>
diff --git a/src/Numerics/LinearAlgebra/Generic/Vector.cs b/src/Numerics/LinearAlgebra/Generic/Vector.cs
index dbd27fb3..ff1f8088 100644
--- a/src/Numerics/LinearAlgebra/Generic/Vector.cs
+++ b/src/Numerics/LinearAlgebra/Generic/Vector.cs
@@ -1176,7 +1176,7 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
         public virtual Matrix<T> ToColumnMatrix()
         {
             var result = CreateMatrix(Count, 1);
-            result.Storage.CopyColumnFrom(Storage, 0, skipClearing: true);
+            Storage.CopyToColumnUnchecked(result.Storage, 0, skipClearing: true);
             return result;
         }
 
@@ -1189,7 +1189,7 @@ namespace MathNet.Numerics.LinearAlgebra.Generic
         public virtual Matrix<T> ToRowMatrix()
         {
             var result = CreateMatrix(1, Count);
-            result.Storage.CopyRowFrom(Storage, 0, skipClearing: true);
+            Storage.CopyToRowUnchecked(result.Storage, 0, skipClearing: true);
             return result;
         }
 
diff --git a/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
index 5729d9cd..90937964 100644
--- a/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
@@ -174,26 +174,6 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
-        internal override void CopySubRowFromUnchecked(VectorStorage<T> source, int rowIndex, int sourceColumnIndex, int targetColumnIndex, int columnCount, bool skipClearing = false)
-        {
-            var sourceDense = source as DenseVectorStorage<T>;
-            if (sourceDense != null)
-            {
-                for (int j = 0; j < columnCount; j++)
-                {
-                    Data[(j + targetColumnIndex) * RowCount + rowIndex] = sourceDense.Data[j + sourceColumnIndex];
-                }
-                return;
-            }
-
-            // FALL BACK
-
-            for (int j = sourceColumnIndex, jj = targetColumnIndex; j < sourceColumnIndex + columnCount; j++, jj++)
-            {
-                Data[(jj * RowCount) + rowIndex] = source.At(j);
-            }
-        }
-
         // COLUMN COPY
 
         internal override void CopySubColumnToUnchecked(VectorStorage<T> target, int columnIndex, int sourceRowIndex, int targetRowIndex, int rowCount, bool skipClearing = false)
@@ -214,24 +194,6 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
-        internal override void CopySubColumnFromUnchecked(VectorStorage<T> source, int columnIndex, int sourceRowIndex, int targetRowIndex, int rowCount, bool skipClearing = false)
-        {
-            var sourceDense = source as DenseVectorStorage<T>;
-            if (sourceDense != null)
-            {
-                Array.Copy(sourceDense.Data, sourceRowIndex, Data, columnIndex * RowCount + targetRowIndex, rowCount);
-                return;
-            }
-
-            // FALL BACK
-
-            var offset = columnIndex * RowCount;
-            for (int i = sourceRowIndex, ii = targetRowIndex; i < sourceRowIndex + rowCount; i++, ii++)
-            {
-                Data[offset + ii] = source.At(i);
-            }
-        }
-
         // EXTRACT
 
         public override T[] ToRowMajorArray()
diff --git a/src/Numerics/LinearAlgebra/Storage/DenseVectorStorage.cs b/src/Numerics/LinearAlgebra/Storage/DenseVectorStorage.cs
index 896991b2..822a49f3 100644
--- a/src/Numerics/LinearAlgebra/Storage/DenseVectorStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/DenseVectorStorage.cs
@@ -89,33 +89,71 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             Array.Clear(Data, index, count);
         }
 
+        // VECTOR COPY
+
         internal override void CopyToUnchecked(VectorStorage<T> target, bool skipClearing = false)
         {
             var denseTarget = target as DenseVectorStorage<T>;
             if (denseTarget != null)
             {
-                CopyToUnchecked(denseTarget);
+                if (!ReferenceEquals(this, denseTarget))
+                {
+                    Array.Copy(Data, 0, denseTarget.Data, 0, Data.Length);
+                }
                 return;
             }
 
             // FALL BACK
 
-            for (int i = 0; i < Length; i++)
+            for (int i = 0; i < Data.Length; i++)
             {
                 target.At(i, Data[i]);
             }
         }
 
-        void CopyToUnchecked(DenseVectorStorage<T> target)
+        // ROW COPY
+
+        internal override void CopyToRowUnchecked(MatrixStorage<T> target, int rowIndex, bool skipClearing = false)
+        {
+            var denseTarget = target as DenseColumnMajorMatrixStorage<T>;
+            if (denseTarget != null)
+            {
+                for (int j = 0; j < Data.Length; j++)
+                {
+                    denseTarget.Data[j*target.RowCount + rowIndex] = Data[j];
+                }
+                return;
+            }
+
+            // FALL BACK
+
+            for (int j = 0; j < Length; j++)
+            {
+                target.At(rowIndex, j, Data[j]);
+            }
+        }
+
+        // COLUMN COPY
+
+        internal override void CopyToColumnUnchecked(MatrixStorage<T> target, int columnIndex, bool skipClearing = false)
         {
-            if (ReferenceEquals(this, target))
+            var denseTarget = target as DenseColumnMajorMatrixStorage<T>;
+            if (denseTarget != null)
             {
+                Array.Copy(Data, 0, denseTarget.Data, columnIndex * denseTarget.RowCount, Data.Length);
                 return;
             }
 
-            Array.Copy(Data, 0, target.Data, 0, Data.Length);
+            // FALL BACK
+
+            for (int i = 0; i < Length; i++)
+            {
+                target.At(i, columnIndex, Data[i]);
+            }
         }
 
+        // SUB-VECTOR COPY
+
         internal override void CopySubVectorToUnchecked(VectorStorage<T> target,
             int sourceIndex, int targetIndex, int count,
             bool skipClearing = false)
@@ -123,7 +161,7 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             var denseTarget = target as DenseVectorStorage<T>;
             if (denseTarget != null)
             {
-                CopySubVectorToUnchecked(denseTarget, sourceIndex, targetIndex, count);
+                Array.Copy(Data, sourceIndex, denseTarget.Data, targetIndex, count);
                 return;
             }
 
@@ -132,10 +170,49 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             base.CopySubVectorToUnchecked(target, sourceIndex, targetIndex, count, skipClearing);
         }
 
-        void CopySubVectorToUnchecked(DenseVectorStorage<T> target,
-            int sourceIndex, int targetIndex, int count)
+        // SUB-ROW COPY
+
+        internal override void CopyToSubRowUnchecked(MatrixStorage<T> target, int rowIndex,
+            int sourceColumnIndex, int targetColumnIndex, int columnCount,
+            bool skipClearing = false)
+        {
+            var denseTarget = target as DenseColumnMajorMatrixStorage<T>;
+            if (denseTarget != null)
+            {
+                for (int j = 0; j < Data.Length; j++)
+                {
+                    denseTarget.Data[(j + targetColumnIndex) * target.RowCount + rowIndex] = Data[j + sourceColumnIndex];
+                }
+                return;
+            }
+
+            // FALL BACK
+
+            for (int j = sourceColumnIndex, jj = targetColumnIndex; j < sourceColumnIndex + columnCount; j++, jj++)
+            {
+                target.At(rowIndex, jj, Data[j]);
+            }
+        }
+
+        // SUB-COLUMN COPY
+
+        internal override void CopyToSubColumnUnchecked(MatrixStorage<T> target, int columnIndex,
+            int sourceRowIndex, int targetRowIndex, int rowCount,
+            bool skipClearing = false)
         {
-            Array.Copy(Data, sourceIndex, target.Data, targetIndex, count);
+            var denseTarget = target as DenseColumnMajorMatrixStorage<T>;
+            if (denseTarget != null)
+            {
+                Array.Copy(Data, sourceRowIndex, denseTarget.Data, columnIndex*denseTarget.RowCount + targetRowIndex, rowCount);
+                return;
+            }
+
+            // FALL BACK
+
+            for (int i = sourceRowIndex, ii = targetRowIndex; i < sourceRowIndex + rowCount; i++, ii++)
+            {
+                target.At(ii, columnIndex, Data[i]);
+            }
         }
     }
 }
diff --git a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
index f6ed538a..9d586e35 100644
--- a/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/MatrixStorage.cs
@@ -332,40 +332,6 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
-        public void CopyRowFrom(VectorStorage<T> source, int rowIndex, bool skipClearing = false)
-        {
-            if (source == null)
-            {
-                throw new ArgumentNullException("source");
-            }
-
-            ValidateRowRange(source, rowIndex);
-            CopySubRowFromUnchecked(source, rowIndex, 0, 0, ColumnCount, skipClearing);
-        }
-
-        public void CopySubRowFrom(VectorStorage<T> source, int rowIndex,
-            int sourceColumnIndex, int targetColumnIndex, int columnCount,
-            bool skipClearing = false)
-        {
-            if (source == null)
-            {
-                throw new ArgumentNullException("source");
-            }
-
-            ValidateSubRowRange(source, rowIndex, targetColumnIndex, sourceColumnIndex, columnCount);
-            CopySubRowFromUnchecked(source, rowIndex, sourceColumnIndex, targetColumnIndex, columnCount, skipClearing);
-        }
-
-        internal virtual void CopySubRowFromUnchecked(VectorStorage<T> source, int rowIndex,
-            int sourceColumnIndex, int targetColumnIndex, int columnCount,
-            bool skipClearing = false)
-        {
-            for (int j = sourceColumnIndex, jj = targetColumnIndex; j < sourceColumnIndex + columnCount; j++, jj++)
-            {
-                At(rowIndex, jj, source.At(j));
-            }
-        }
-
         // COLUMN COPY
 
         public void CopyColumnTo(VectorStorage<T> target, int columnIndex, bool skipClearing = false)
@@ -402,40 +368,6 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
-        public void CopyColumnFrom(VectorStorage<T> source, int columnIndex, bool skipClearing = false)
-        {
-            if (source == null)
-            {
-                throw new ArgumentNullException("source");
-            }
-
-            ValidateColumnRange(source, columnIndex);
-            CopySubColumnFromUnchecked(source, columnIndex, 0, 0, RowCount, skipClearing);
-        }
-
-        public void CopySubColumnFrom(VectorStorage<T> source, int columnIndex,
-            int sourceRowIndex, int targetRowIndex, int rowCount,
-            bool skipClearing = false)
-        {
-            if (source == null)
-            {
-                throw new ArgumentNullException("source");
-            }
-
-            ValidateSubColumnRange(source, columnIndex, targetRowIndex, sourceRowIndex, rowCount);
-            CopySubColumnFromUnchecked(source, columnIndex, sourceRowIndex, targetRowIndex, rowCount, skipClearing);
-        }
-
-        internal virtual void CopySubColumnFromUnchecked(VectorStorage<T> source, int columnIndex,
-            int sourceRowIndex, int targetRowIndex, int rowCount,
-            bool skipClearing = false)
-        {
-            for (int i = sourceRowIndex, ii = targetRowIndex; i < sourceRowIndex + rowCount; i++, ii++)
-            {
-                At(ii, columnIndex, source.At(i));
-            }
-        }
-
         // EXTRACT
 
         public virtual T[] ToRowMajorArray()
diff --git a/src/Numerics/LinearAlgebra/Storage/SparseVectorStorage.cs b/src/Numerics/LinearAlgebra/Storage/SparseVectorStorage.cs
index ec4e843c..1094ba7b 100644
--- a/src/Numerics/LinearAlgebra/Storage/SparseVectorStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/SparseVectorStorage.cs
@@ -284,6 +284,8 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             return hash;
         }
 
+        // VECTOR COPY
+
         internal override void CopyToUnchecked(VectorStorage<T> target, bool skipClearing = false)
         {
             var sparseTarget = target as SparseVectorStorage<T>;
@@ -333,6 +335,8 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
+        // SUB-VECTOR COPY
+
         internal override void CopySubVectorToUnchecked(VectorStorage<T> target,
             int sourceIndex, int targetIndex, int count,
             bool skipClearing = false)
diff --git a/src/Numerics/LinearAlgebra/Storage/VectorStorage.Validation.cs b/src/Numerics/LinearAlgebra/Storage/VectorStorage.Validation.cs
index 325920fa..a4588737 100644
--- a/src/Numerics/LinearAlgebra/Storage/VectorStorage.Validation.cs
+++ b/src/Numerics/LinearAlgebra/Storage/VectorStorage.Validation.cs
@@ -36,7 +36,7 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
     // ReSharper disable UnusedParameter.Global
     public partial class VectorStorage<T>
     {
-        protected void ValidateRange(int index)
+        void ValidateRange(int index)
         {
             if (index < 0 || index >= Length)
             {
@@ -44,7 +44,7 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
-        protected void ValidateSubVectorRange(VectorStorage<T> target,
+        void ValidateSubVectorRange(VectorStorage<T> target,
             int sourceIndex, int targetIndex, int count)
         {
             if (count < 1)
@@ -80,6 +80,108 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                 throw new ArgumentOutOfRangeException("count");
             }
         }
+
+        void ValidateRowRange(MatrixStorage<T> target, int rowIndex)
+        {
+            if (rowIndex >= target.RowCount || rowIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("rowIndex");
+            }
+
+            if (target.ColumnCount != Length)
+            {
+                throw new ArgumentException(Resources.ArgumentMatrixSameRowDimension, "target");
+            }
+        }
+
+        void ValidateColumnRange(MatrixStorage<T> target, int columnIndex)
+        {
+            if (columnIndex >= target.ColumnCount || columnIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("columnIndex");
+            }
+
+            if (target.RowCount != Length)
+            {
+                throw new ArgumentException(Resources.ArgumentMatrixSameColumnDimension, "target");
+            }
+        }
+
+        void ValidateSubRowRange(MatrixStorage<T> target, int rowIndex,
+            int sourceColumnIndex, int targetColumnIndex, int columnCount)
+        {
+            if (columnCount < 1)
+            {
+                throw new ArgumentOutOfRangeException("columnCount", Resources.ArgumentMustBePositive);
+            }
+
+            // Verify Source
+
+            if (sourceColumnIndex >= Length || sourceColumnIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("sourceColumnIndex");
+            }
+
+            if (sourceColumnIndex + columnCount > Length)
+            {
+                throw new ArgumentOutOfRangeException("columnCount");
+            }
+
+            // Verify Target
+
+            if (rowIndex >= target.RowCount || rowIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("rowIndex");
+            }
+
+            if (targetColumnIndex >= target.ColumnCount || targetColumnIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("targetColumnIndex");
+            }
+
+            if (targetColumnIndex + columnCount > target.ColumnCount)
+            {
+                throw new ArgumentOutOfRangeException("columnCount");
+            }
+        }
+
+        void ValidateSubColumnRange(MatrixStorage<T> target, int columnIndex,
+            int sourceRowIndex, int targetRowIndex, int rowCount)
+        {
+            if (rowCount < 1)
+            {
+                throw new ArgumentOutOfRangeException("rowCount", Resources.ArgumentMustBePositive);
+            }
+
+            // Verify Source
+
+            if (sourceRowIndex >= Length || sourceRowIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("sourceRowIndex");
+            }
+
+            if (sourceRowIndex + rowCount > Length)
+            {
+                throw new ArgumentOutOfRangeException("rowCount");
+            }
+
+            // Verify Target
+
+            if (columnIndex >= target.ColumnCount || columnIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("columnIndex");
+            }
+
+            if (targetRowIndex >= target.RowCount || targetRowIndex < 0)
+            {
+                throw new ArgumentOutOfRangeException("targetRowIndex");
+            }
+
+            if (targetRowIndex + rowCount > target.RowCount)
+            {
+                throw new ArgumentOutOfRangeException("rowCount");
+            }
+        }
     }
     // ReSharper restore UnusedParameter.Global
 }
diff --git a/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs b/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
index 8883512e..1bb76f45 100644
--- a/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
@@ -196,6 +196,8 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             return hash;
         }
 
+        // VECTOR COPY
+
         public void CopyTo(VectorStorage<T> target, bool skipClearing = false)
         {
             if (target == null)
@@ -224,6 +226,60 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
+        // ROW COPY
+
+        public void CopyToRow(MatrixStorage<T> target, int rowIndex, bool skipClearing = false)
+        {
+            if (target == null)
+            {
+                throw new ArgumentNullException("target");
+            }
+
+            if (Length != target.ColumnCount)
+            {
+                throw new ArgumentException(Resources.ArgumentVectorsSameLength, "target");
+            }
+
+            ValidateRowRange(target, rowIndex);
+            CopyToRowUnchecked(target, rowIndex, skipClearing);
+        }
+
+        internal virtual void CopyToRowUnchecked(MatrixStorage<T> target, int rowIndex, bool skipClearing = false)
+        {
+            for (int j = 0; j < Length; j++)
+            {
+                target.At(rowIndex, j, At(j));
+            }
+        }
+
+        // COLUMN COPY
+
+        public void CopyToColumn(MatrixStorage<T> target, int columnIndex, bool skipClearing = false)
+        {
+            if (target == null)
+            {
+                throw new ArgumentNullException("target");
+            }
+
+            if (Length != target.RowCount)
+            {
+                throw new ArgumentException(Resources.ArgumentVectorsSameLength, "target");
+            }
+
+            ValidateColumnRange(target, columnIndex);
+            CopyToColumnUnchecked(target, columnIndex, skipClearing);
+        }
+
+        internal virtual void CopyToColumnUnchecked(MatrixStorage<T> target, int columnIndex, bool skipClearing = false)
+        {
+            for (int i = 0; i < Length; i++)
+            {
+                target.At(i, columnIndex, At(i));
+            }
+        }
+
+        // SUB-VECTOR COPY
+
         public void CopySubVectorTo(VectorStorage<T> target,
             int sourceIndex, int targetIndex, int count,
             bool skipClearing = false)
@@ -234,7 +290,6 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
 
             ValidateSubVectorRange(target, sourceIndex, targetIndex, count);
-
             CopySubVectorToUnchecked(target, sourceIndex, targetIndex, count, skipClearing);
         }
 
@@ -262,5 +317,55 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                 target.At(ii, At(i));
             }
         }
+
+        // SUB-ROW COPY
+
+        public void CopyToSubRow(MatrixStorage<T> target, int rowIndex,
+            int sourceColumnIndex, int targetColumnIndex, int columnCount,
+            bool skipClearing = false)
+        {
+            if (target == null)
+            {
+                throw new ArgumentNullException("target");
+            }
+
+            ValidateSubRowRange(target, rowIndex, targetColumnIndex, sourceColumnIndex, columnCount);
+            CopyToSubRowUnchecked(target, rowIndex, sourceColumnIndex, targetColumnIndex, columnCount, skipClearing);
+        }
+
+        internal virtual void CopyToSubRowUnchecked(MatrixStorage<T> target, int rowIndex,
+            int sourceColumnIndex, int targetColumnIndex, int columnCount,
+            bool skipClearing = false)
+        {
+            for (int j = sourceColumnIndex, jj = targetColumnIndex; j < sourceColumnIndex + columnCount; j++, jj++)
+            {
+                target.At(rowIndex, jj, At(j));
+            }
+        }
+
+        // SUB-COLUMN COPY
+
+        public void CopyToSubColumn(MatrixStorage<T> target, int columnIndex,
+            int sourceRowIndex, int targetRowIndex, int rowCount,
+            bool skipClearing = false)
+        {
+            if (target == null)
+            {
+                throw new ArgumentNullException("target");
+            }
+
+            ValidateSubColumnRange(target, columnIndex, sourceRowIndex, targetRowIndex, rowCount);
+            CopyToSubColumnUnchecked(target, columnIndex, sourceRowIndex, targetRowIndex, rowCount, skipClearing);
+        }
+
+        internal virtual void CopyToSubColumnUnchecked(MatrixStorage<T> target, int columnIndex,
+            int sourceRowIndex, int targetRowIndex, int rowCount,
+            bool skipClearing = false)
+        {
+            for (int i = sourceRowIndex, ii = targetRowIndex; i < sourceRowIndex + rowCount; i++, ii++)
+            {
+                target.At(ii, columnIndex, At(i));
+            }
+        }
     }
 }