LA Storage: this = range checked, At = not checked

src/Numerics/LinearAlgebra/Complex/DenseMatrix.cs

@@ -283,7 +283,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         }
 
         /// <summary>
-        /// Gets or sets the value at the given row and column.
+        /// Gets or sets the value at the given row and column, with range checking.
         /// </summary>
         /// <param name="row">
         /// The row of the element.
@@ -296,35 +296,8 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// to get and set values without range checking.</remarks>
         public override Complex this[int row, int column]
         {
-            get
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                return _data[(column * _rowCount) + row];
-            }
-
-            set
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                _data[(column * _rowCount) + row] = value;
-            }
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
         }
 
         /// <summary>
@@ -341,7 +314,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// </returns>
         public override Complex At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -358,7 +331,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// </param>
         public override void At(int row, int column, Complex value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Complex/DiagonalMatrix.cs

@@ -149,6 +149,24 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
             get { return _storage; }
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,Complex)"/>
+        /// to get and set values without range checking.</remarks>
+        public override Complex this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -165,7 +183,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override Complex At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -185,7 +203,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override void At(int row, int column, Complex value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Complex/SparseMatrix.cs

@@ -150,7 +150,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
             {
                 for (var j = 0; j < columns; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i + (j * rows)]);
+                    _storage.At(i, j, array[i + (j * rows)]);
                 }
             }
         }
@@ -168,7 +168,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
             {
                 for (var j = 0; j < _storage.ColumnCount; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i, j]);
+                    _storage.At(i, j, array[i, j]);
                 }
             }
         }
@@ -194,7 +194,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
                 {
                     for (var j = 0; j < columns; j++)
                     {
-                        _storage.SetValueAt(i, j, matrix.At(i, j));
+                        _storage.At(i, j, matrix.At(i, j));
                     }
                 }
             }
@@ -448,7 +448,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
                     if ((columnIndices[j] >= columnIndex) && (columnIndices[j] < columnIndex + columnCount))
                     {
                         var column = columnIndices[j] - columnIndex;
-                        result._storage.SetValueAt(row, column, values[j]);
+                        result._storage.At(row, column, values[j]);
                     }
                 }
             }
@@ -617,6 +617,24 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
             return ret;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,Complex)"/>
+        /// to get and set values without range checking.</remarks>
+        public override Complex this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -631,7 +649,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// </returns>
         public override Complex At(int row, int column)
         {
-            return _storage.GetValueAt(row, column);
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -648,7 +666,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         /// </param>
         public override void At(int row, int column, Complex value)
         {
-            _storage.SetValueAt(row, column, value);
+            _storage.At(row, column, value);
         }
 
         /// <summary>
@@ -760,7 +778,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
 
                 for (var j = startIndex; j < endIndex; j++)
                 {
-                    retStorage.SetValueAt(columnIndices[j], i, values[j]);
+                    retStorage.At(columnIndices[j], i, values[j]);
                 }
             }
 
@@ -1354,7 +1372,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
                         }
                     }
 
-                    resultSparse.Storage.SetValueAt(i, j, sum + result.At(i, j));
+                    resultSparse.Storage.At(i, j, sum + result.At(i, j));
                 }
             }
         }

src/Numerics/LinearAlgebra/Complex32/DenseMatrix.cs

@@ -283,7 +283,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         }
 
         /// <summary>
-        /// Gets or sets the value at the given row and column.
+        /// Gets or sets the value at the given row and column, with range checking.
         /// </summary>
         /// <param name="row">
         /// The row of the element.
@@ -296,35 +296,8 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// to get and set values without range checking.</remarks>
         public override Complex32 this[int row, int column]
         {
-            get
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                return _data[(column * _rowCount) + row];
-            }
-
-            set
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                _data[(column * _rowCount) + row] = value;
-            }
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
         }
 
         /// <summary>
@@ -341,7 +314,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// </returns>
         public override Complex32 At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -358,7 +331,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// </param>
         public override void At(int row, int column, Complex32 value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Complex32/DiagonalMatrix.cs

@@ -154,6 +154,24 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
             get { return _storage; }
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,Complex32)"/>
+        /// to get and set values without range checking.</remarks>
+        public override Complex32 this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -170,7 +188,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override Complex32 At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -190,7 +208,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override void At(int row, int column, Complex32 value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Complex32/SparseMatrix.cs

@@ -150,7 +150,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
             {
                 for (var j = 0; j < columns; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i + (j * rows)]);
+                    _storage.At(i, j, array[i + (j * rows)]);
                 }
             }
         }
@@ -168,7 +168,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
             {
                 for (var j = 0; j < _storage.ColumnCount; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i, j]);
+                    _storage.At(i, j, array[i, j]);
                 }
             }
         }
@@ -194,7 +194,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
                 {
                     for (var j = 0; j < columns; j++)
                     {
-                        _storage.SetValueAt(i, j, matrix.At(i, j));
+                        _storage.At(i, j, matrix.At(i, j));
                     }
                 }
             }
@@ -448,7 +448,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
                     if ((columnIndices[j] >= columnIndex) && (columnIndices[j] < columnIndex + columnCount))
                     {
                         var column = columnIndices[j] - columnIndex;
-                        result._storage.SetValueAt(row, column, values[j]);
+                        result._storage.At(row, column, values[j]);
                     }
                 }
             }
@@ -617,6 +617,24 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
             return ret;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,Complex32)"/>
+        /// to get and set values without range checking.</remarks>
+        public override Complex32 this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -631,7 +649,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// </returns>
         public override Complex32 At(int row, int column)
         {
-            return _storage.GetValueAt(row, column);
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -648,7 +666,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         /// </param>
         public override void At(int row, int column, Complex32 value)
         {
-            _storage.SetValueAt(row, column, value);
+            _storage.At(row, column, value);
         }
 
         /// <summary>
@@ -761,7 +779,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
 
                 for (var j = startIndex; j < endIndex; j++)
                 {
-                    retStorage.SetValueAt(columnIndices[j], i, values[j]);
+                    retStorage.At(columnIndices[j], i, values[j]);
                 }
             }
 
@@ -1354,7 +1372,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
                         }
                     }
 
-                    resultSparse.Storage.SetValueAt(i, j, sum + result.At(i, j));
+                    resultSparse.Storage.At(i, j, sum + result.At(i, j));
                 }
             }
         }

src/Numerics/LinearAlgebra/Double/DenseMatrix.cs

@@ -283,7 +283,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         }
 
         /// <summary>
-        /// Gets or sets the value at the given row and column.
+        /// Gets or sets the value at the given row and column, with range checking.
         /// </summary>
         /// <param name="row">
         /// The row of the element.
@@ -296,35 +296,8 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// to get and set values without range checking.</remarks>
         public override double this[int row, int column]
         {
-            get
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                return _data[(column * _rowCount) + row];
-            }
-
-            set
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                _data[(column * _rowCount) + row] = value;
-            }
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
         }
 
         /// <summary>
@@ -341,7 +314,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// </returns>
         public override double At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
         
         /// <summary>
@@ -358,7 +331,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// </param>
         public override void At(int row, int column, double value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Double/DiagonalMatrix.cs

@@ -148,6 +148,24 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             get { return _storage; }
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,double)"/>
+        /// to get and set values without range checking.</remarks>
+        public override double this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -164,7 +182,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override double At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -184,7 +202,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override void At(int row, int column, double value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Double/SparseMatrix.cs

@@ -149,7 +149,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             {
                 for (var j = 0; j < columns; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i + (j * rows)]);
+                    _storage.At(i, j, array[i + (j * rows)]);
                 }
             }
         }
@@ -167,7 +167,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             {
                 for (var j = 0; j < _storage.ColumnCount; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i, j]);
+                    _storage.At(i, j, array[i, j]);
                 }
             }
         }
@@ -193,7 +193,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
                 {
                     for (var j = 0; j < columns; j++)
                     {
-                        _storage.SetValueAt(i, j, matrix.At(i, j));
+                        _storage.At(i, j, matrix.At(i, j));
                     }
                 }  
             }
@@ -447,7 +447,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
                     if ((columnIndices[j] >= columnIndex) && (columnIndices[j] < columnIndex + columnCount))
                     {
                         var column = columnIndices[j] - columnIndex;
-                        result._storage.SetValueAt(row, column, values[j]);
+                        result._storage.At(row, column, values[j]);
                     }
                 }
             }
@@ -616,6 +616,24 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             return ret;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,double)"/>
+        /// to get and set values without range checking.</remarks>
+        public override double this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -630,7 +648,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// </returns>
         public override double At(int row, int column)
         {
-            return _storage.GetValueAt(row, column);
+            return _storage.At(row, column);
         }
         
         /// <summary>
@@ -647,7 +665,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         /// </param>
         public override void At(int row, int column, double value)
         {
-            _storage.SetValueAt(row, column, value);
+            _storage.At(row, column, value);
         }
 
         /// <summary>
@@ -759,7 +777,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
 
                 for (var j = startIndex; j < endIndex; j++)
                 {
-                    retStorage.SetValueAt(columnIndices[j], i, values[j]);
+                    retStorage.At(columnIndices[j], i, values[j]);
                 }
             }
 
@@ -1352,7 +1370,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
                         }
                     }
 
-                    resultSparse.Storage.SetValueAt(i, j, sum + result.At(i, j));
+                    resultSparse.Storage.At(i, j, sum + result.At(i, j));
                 }
             }
         }

src/Numerics/LinearAlgebra/Single/DenseMatrix.cs

@@ -283,7 +283,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         }
 
         /// <summary>
-        /// Gets or sets the value at the given row and column.
+        /// Gets or sets the value at the given row and column, with range checking.
         /// </summary>
         /// <param name="row">
         /// The row of the element.
@@ -296,35 +296,8 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// to get and set values without range checking.</remarks>
         public override float this[int row, int column]
         {
-            get
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                return _data[(column * _rowCount) + row];
-            }
-
-            set
-            {
-                if (row < 0 || row >= _rowCount)
-                {
-                    throw new ArgumentOutOfRangeException("row");
-                }
-
-                if (column < 0 || column >= _columnCount)
-                {
-                    throw new ArgumentOutOfRangeException("column");
-                }
-
-                _data[(column * _rowCount) + row] = value;
-            }
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
         }
 
         /// <summary>
@@ -341,7 +314,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// </returns>
         public override float At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -358,7 +331,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// </param>
         public override void At(int row, int column, float value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Single/DiagonalMatrix.cs

@@ -153,6 +153,24 @@ namespace MathNet.Numerics.LinearAlgebra.Single
             get { return _storage; }
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,float)"/>
+        /// to get and set values without range checking.</remarks>
+        public override float this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -169,7 +187,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override float At(int row, int column)
         {
-            return _storage[row, column];
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -189,7 +207,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// may be thrown if one of the indices is outside the dimensions of the matrix.</exception>
         public override void At(int row, int column, float value)
         {
-            _storage[row, column] = value;
+            _storage.At(row, column, value);
         }
 
         /// <summary>

src/Numerics/LinearAlgebra/Single/SparseMatrix.cs

@@ -149,7 +149,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
             {
                 for (var j = 0; j < columns; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i + (j * rows)]);
+                    _storage.At(i, j, array[i + (j * rows)]);
                 }
             }
         }
@@ -167,7 +167,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
             {
                 for (var j = 0; j < _storage.ColumnCount; j++)
                 {
-                    _storage.SetValueAt(i, j, array[i, j]);
+                    _storage.At(i, j, array[i, j]);
                 }
             }
         }
@@ -193,7 +193,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
                 {
                     for (var j = 0; j < columns; j++)
                     {
-                        _storage.SetValueAt(i, j, matrix.At(i, j));
+                        _storage.At(i, j, matrix.At(i, j));
                     }
                 }
             }
@@ -447,7 +447,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
                     if ((columnIndices[j] >= columnIndex) && (columnIndices[j] < columnIndex + columnCount))
                     {
                         var column = columnIndices[j] - columnIndex;
-                        result._storage.SetValueAt(row, column, values[j]);
+                        result._storage.At(row, column, values[j]);
                     }
                 }
             }
@@ -616,6 +616,24 @@ namespace MathNet.Numerics.LinearAlgebra.Single
             return ret;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,float)"/>
+        /// to get and set values without range checking.</remarks>
+        public override float this[int row, int column]
+        {
+            get { return _storage[row, column]; }
+            set { _storage[row, column] = value; }
+        }
+
         /// <summary>
         /// Retrieves the requested element without range checking.
         /// </summary>
@@ -630,7 +648,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// </returns>
         public override float At(int row, int column)
         {
-            return _storage.GetValueAt(row, column);
+            return _storage.At(row, column);
         }
 
         /// <summary>
@@ -647,7 +665,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         /// </param>
         public override void At(int row, int column, float value)
         {
-            _storage.SetValueAt(row, column, value);
+            _storage.At(row, column, value);
         }
 
         /// <summary>
@@ -759,7 +777,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
 
                 for (var j = startIndex; j < endIndex; j++)
                 {
-                    retStorage.SetValueAt(columnIndices[j], i, values[j]);
+                    retStorage.At(columnIndices[j], i, values[j]);
                 }
             }
 
@@ -1351,7 +1369,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
                         }
                     }
 
-                    resultSparse.Storage.SetValueAt(i, j, sum + result.At(i, j));
+                    resultSparse.Storage.At(i, j, sum + result.At(i, j));
                 }
             }
         }

src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs

@@ -29,10 +29,65 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             Data = data;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,T)"/>
+        /// to get and set values without range checking.</remarks>
         public T this[int row, int column]
         {
-            get { return Data[(column*RowCount) + row]; }
-            set { Data[(column*RowCount) + row] = value; }
+            get
+            {
+                if (row < 0 || row >= RowCount)
+                {
+                    throw new ArgumentOutOfRangeException("row");
+                }
+
+                if (column < 0 || column >= ColumnCount)
+                {
+                    throw new ArgumentOutOfRangeException("column");
+                }
+
+                return At(row, column);
+            }
+
+            set
+            {
+                if (row < 0 || row >= RowCount)
+                {
+                    throw new ArgumentOutOfRangeException("row");
+                }
+
+                if (column < 0 || column >= ColumnCount)
+                {
+                    throw new ArgumentOutOfRangeException("column");
+                }
+
+                At(row, column, value);
+            }
+        }
+
+        /// <summary>
+        /// Retrieves the requested element without range checking.
+        /// </summary>
+        public T At(int row, int column)
+        {
+            return Data[(column * RowCount) + row];
+        }
+
+        /// <summary>
+        /// Sets the element without range checking.
+        /// </summary>
+        public void At(int row, int column, T value)
+        {
+            Data[(column * RowCount) + row] = value;
         }
 
         public void Clear()

src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs

@@ -48,16 +48,49 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             ValueCount = 0;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,T)"/>
+        /// to get and set values without range checking.</remarks>
         public T this[int row, int column]
         {
-            get { return GetValueAt(row, column); }
-            set { SetValueAt(row, column, value); }
-        }
+            get
+            {
+                if (row < 0 || row >= RowCount)
+                {
+                    throw new ArgumentOutOfRangeException("row");
+                }
 
-        public void Clear()
-        {
-            ValueCount = 0;
-            Array.Clear(RowPointers, 0, RowPointers.Length);
+                if (column < 0 || column >= ColumnCount)
+                {
+                    throw new ArgumentOutOfRangeException("column");
+                }
+
+                return At(row, column);
+            }
+
+            set
+            {
+                if (row < 0 || row >= RowCount)
+                {
+                    throw new ArgumentOutOfRangeException("row");
+                }
+
+                if (column < 0 || column >= ColumnCount)
+                {
+                    throw new ArgumentOutOfRangeException("column");
+                }
+
+                At(row, column, value);
+            }
         }
 
         /// <summary>
@@ -72,20 +105,21 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
         /// <returns>
         /// The requested element.
         /// </returns>
-        public T GetValueAt(int row, int column)
+        /// <remarks>Not range-checked.</remarks>
+        public T At(int row, int column)
         {
             var index = FindItem(row, column);
             return index >= 0 ? Values[index] : _zero;
         }
 
         /// <summary>
-        /// Created this method because we cannot call "virtual At" in constructor of the class, but we need to do it
+        /// Sets the element without range checking.
         /// </summary>
         /// <param name="row"> The row of the element. </param>
         /// <param name="column"> The column of the element. </param>
         /// <param name="value"> The value to set the element to. </param>
-        /// <remarks>WARNING: This method is not thread safe. Use "lock" with it and be sure to avoid deadlocks</remarks>
-        public void SetValueAt(int row, int column, T value)
+        /// <remarks>WARNING: This method is not thread safe. Use "lock" with it and be sure to avoid deadlocks.</remarks>
+        public void At(int row, int column, T value)
         {
             var index = FindItem(row, column);
             if (index >= 0)
@@ -151,6 +185,12 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             }
         }
 
+        public void Clear()
+        {
+            ValueCount = 0;
+            Array.Clear(RowPointers, 0, RowPointers.Length);
+        }
+
         /// <summary>
         /// Delete value from internal storage
         /// </summary>

src/Numerics/LinearAlgebra/Storage/SparseDiagonalMatrixStorage.cs

@@ -32,22 +32,71 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
             Data = data;
         }
 
+        /// <summary>
+        /// Gets or sets the value at the given row and column, with range checking.
+        /// </summary>
+        /// <param name="row">
+        /// The row of the element.
+        /// </param>
+        /// <param name="column">
+        /// The column of the element.
+        /// </param>
+        /// <value>The value to get or set.</value>
+        /// <remarks>This method is ranged checked. <see cref="At(int,int)"/> and <see cref="At(int,int,T)"/>
+        /// to get and set values without range checking.</remarks>
         public T this[int row, int column]
         {
             get
             {
-                return row == column ? Data[row] : _zero;
+                if (row < 0 || row >= RowCount)
+                {
+                    throw new ArgumentOutOfRangeException("row");
+                }
+
+                if (column < 0 || column >= ColumnCount)
+                {
+                    throw new ArgumentOutOfRangeException("column");
+                }
+
+                return At(row, column);
             }
+
             set
             {
-                if (row == column)
+                if (row < 0 || row >= RowCount)
                 {
-                    Data[row] = value;
+                    throw new ArgumentOutOfRangeException("row");
                 }
-                else if (!_zero.Equals(value))
+
+                if (column < 0 || column >= ColumnCount)
                 {
-                    throw new IndexOutOfRangeException("Cannot set an off-diagonal element in a diagonal matrix.");
+                    throw new ArgumentOutOfRangeException("column");
                 }
+
+                At(row, column, value);
+            }
+        }
+
+        /// <summary>
+        /// Retrieves the requested element without range checking.
+        /// </summary>
+        public T At(int row, int column)
+        {
+            return row == column ? Data[row] : _zero;
+        }
+
+        /// <summary>
+        /// Sets the element without range checking.
+        /// </summary>
+        public void At(int row, int column, T value)
+        {
+            if (row == column)
+            {
+                Data[row] = value;
+            }
+            else if (!_zero.Equals(value))
+            {
+                throw new IndexOutOfRangeException("Cannot set an off-diagonal element in a diagonal matrix.");
             }
         }