/// <summary>
///
/// </summary>
/// <param name="view"></param>
/// <param name="columnRange"></param>
/// <param name="rowRange"></param>
/// <returns></returns>
public static MatrixBase <T> SubMatrix(
MatrixBase <T> view,
Int32Range columnRange,
Int32Range rowRange)
{
if (!view.DataColumnRange.Contains(columnRange))
{
throw new ArgumentOutOfRangeException("columnRange");
}
if (!view.DataRowRange.Contains(rowRange))
{
throw new ArgumentOutOfRangeException("rowRange");
}
MatrixBase <T> result
= new MatrixBase <T>(view.DataSource,
new Int32Range(
columnRange.Start + view.DataColumnRange.Start,
columnRange.End + view.DataColumnRange.Start),
new Int32Range(
rowRange.Start + view.DataRowRange.Start,
rowRange.End + view.DataRowRange.Start));
return(result);
}
/// <summary>Performs an element-wise binary operation (involving two matricies),
/// returning the result in a new matrix instance</summary>
/// <param name="matrix1">First matrix</param>
/// <param name="matrix2">Second matrix</param>
/// <param name="operation">Binary operation delegate</param>
/// <returns>Matrix instance containing the result of the binary operation</returns>
public static MatrixBase <T> ElementWiseOperation(
MatrixBase <T> matrix1,
MatrixBase <T> matrix2,
ElementBinaryOperationDelegate operation)
{
if (MatrixBase <T> .IsNull(matrix1))
{
throw new ArgumentNullException("matrix1");
}
if (MatrixBase <T> .IsNull(matrix2))
{
throw new ArgumentNullException("matrix2");
}
if (matrix1.ColumnCount != matrix2.ColumnCount)
{
throw new DimensionMismatchException("The number of columns in matrix1 does not equal the number of columns in matrix2");
}
if (matrix1.RowCount != matrix2.RowCount)
{
throw new DimensionMismatchException("The number of rows in matrix1 does not equal the number of rows in matrix2");
}
MatrixBase <T> result = new MatrixBase <T>(matrix1.ColumnCount, matrix1.RowCount);
for (Int32 i = 0; i < result.ColumnCount; i++)
{
for (Int32 j = 0; j < result.RowCount; j++)
{
result[i, j] = operation(matrix1[i, j], matrix2[i, j]);
}
}
return(result);
}
/// <summary>Indicates whether or not two matricies contain same values
/// in an element-wise comparison. Does not verify that the matricies point
/// to the same underlying data-set or element instances</summary>
/// <param name="matrix1">Matrix to compare</param>
/// <param name="matrix2">Matrix to compare</param>
/// <returns>true, if the matricies are equal on an element-wise basis; otherwise, false</returns>
public static Boolean Equality(
MatrixBase <T> matrix1,
MatrixBase <T> matrix2)
{
if ((Object)matrix1 == null || (Object)matrix2 == null)
{
return(false);
}
if (matrix1.ColumnCount != matrix2.ColumnCount)
{
return(false);
}
if (matrix1.RowCount != matrix2.RowCount)
{
return(false);
}
for (Int32 i = 0; i < matrix1.ColumnCount; i++)
{
for (Int32 j = 0; j < matrix1.RowCount; j++)
{
if (!matrix1[i, j].Equals(matrix2[i, j]))
{
return(false);
}
}
}
return(true);
}
/// <summary>Copies the values of the specified source matrix
/// into this (larger) matrix at the specified offset</summary>
/// <param name="sourceMatrix">Source matrix</param>
/// <param name="targetColumnOffset">Target column offset in this matrix</param>
/// <param name="targetRowOffset">Target row offset in this matrix</param>
public virtual void CopyFrom(
MatrixBase <T> sourceMatrix,
Int32 targetColumnOffset,
Int32 targetRowOffset)
{
MatrixBase <T> .ElementWiseCopy(sourceMatrix, this, targetColumnOffset, targetRowOffset);
}
/// <summary>Copies the values of the matrix object into a
/// larger matrix at the specified offset</summary>
/// <param name="matrix">Target matrix</param>
/// <param name="targetColumnOffset">Target matrix column offset</param>
/// <param name="targetRowOffset">Target matrix row offset</param>
public virtual void CopyInto(
MatrixBase <T> targetMatrix,
Int32 targetColumnOffset,
Int32 targetRowOffset)
{
MatrixBase <T> .ElementWiseCopy(this, targetMatrix, targetColumnOffset, targetRowOffset);
}
/// <summary>Indicates whether or not two matricies contain same values
/// in an element-wise comparison. Does not verify that the matricies point
/// to the same underlying data-set or element instances</summary>
/// <param name="matrix1">Matrix to compare</param>
/// <param name="matrix2">Matrix to compare</param>
/// <returns>true, if the matricies are equal on an element-wise basis; otherwise, false</returns>
public static Boolean Equality(DoubleMatrix matrix1, DoubleMatrix matrix2)
{
if ((object)matrix1 == null || (object)matrix2 == null)
{
return(false);
}
return(MatrixBase <Double> .Equality(matrix1.InnerMatrix, matrix2.InnerMatrix));
}
/// <summary>
///
/// </summary>
/// <param name="matrix"></param>
/// <param name="row1"></param>
/// <param name="row2"></param>
public static void SwapColumns(
MatrixBase <T> matrix,
Int32 column1,
Int32 column2)
{
MatrixBase <T> columnTemp = matrix.Columns[column1].Clone();
matrix.Columns[column1] = matrix.Columns[column2];
matrix.Columns[column2] = columnTemp;
}
/// <summary>
///
/// </summary>
/// <param name="matrix"></param>
/// <param name="row1"></param>
/// <param name="row2"></param>
public static void SwapRows(
MatrixBase <T> matrix,
Int32 row1,
Int32 row2)
{
MatrixBase <T> rowTemp = matrix.Rows[row1].Clone();
matrix.Rows[row1] = matrix.Rows[row2];
matrix.Rows[row2] = rowTemp;
}
/// <summary>
///
/// </summary>
/// <param name="matricies"></param>
/// <returns></returns>
public static DoubleMatrix JoinVertical(IEnumerable <DoubleMatrix> matricies)
{
List <MatrixBase <Double> > innerMatrices = new List <MatrixBase <Double> >();
foreach (DoubleMatrix matrix in matricies)
{
innerMatrices.Add(matrix.InnerMatrix);
}
return(new DoubleMatrix(MatrixBase <Double> .JoinVertical(innerMatrices)));
}
/// <summary>CopyInto</summary>
/// <param name="targetMatrix"></param>
/// <param name="targetColumnOffset"></param>
/// <param name="targetRowOffset"></param>
public void CopyInto(
DoubleMatrix targetMatrix,
Int32 targetColumnOffset,
Int32 targetRowOffset)
{
MatrixBase <Double> .ElementWiseCopy(
this.InnerMatrix,
targetMatrix.InnerMatrix,
targetColumnOffset,
targetRowOffset);
}
/// <summary>
///
/// </summary>
/// <param name="matrix"></param>
/// <param name="scalar"></param>
/// <returns></returns>
protected static DoubleMatrix Multiplication(
DoubleMatrix matrix,
double scalar)
{
return(new DoubleMatrix(
MatrixBase <Double> .ElementWiseOperation(
matrix.InnerMatrix,
scalar,
delegate(double element1, double element2)
{ return element1 * element2; })));
}
/// <summary>
///
/// </summary>
/// <param name="matrix1"></param>
/// <param name="matrix2"></param>
/// <returns></returns>
protected static DoubleMatrix Subtraction(
DoubleMatrix matrix1,
DoubleMatrix matrix2)
{
return(new DoubleMatrix(
MatrixBase <Double> .ElementWiseOperation(
matrix1.InnerMatrix,
matrix2.InnerMatrix,
delegate(double element1, double element2)
{ return element1 - element2; })));
}
/// <summary>
///
/// </summary>
/// <param name="matrix"></param>
/// <param name="scalar"></param>
/// <returns></returns>
protected static DoubleMatrix Addition(
DoubleMatrix matrix,
Double scalar)
{
return(new DoubleMatrix(
MatrixBase <Double> .ElementWiseOperation(
matrix.InnerMatrix,
scalar,
delegate(Double element1, Double element2)
{ return element1 + element2; })));
}
/// <summary>CopyFrom</summary>
/// <param name="sourceMatrix"></param>
/// <param name="targetColumnOffset"></param>
/// <param name="targetRowOffset"></param>
public void CopyFrom(
DoubleMatrix sourceMatrix,
Int32 targetColumnOffset,
Int32 targetRowOffset)
{
MatrixBase <Double> .ElementWiseCopy(
sourceMatrix.InnerMatrix,
this.InnerMatrix,
targetColumnOffset,
targetRowOffset);
}
/*************************/
/* PUBLIC STATIC METHODS */
/*************************/
/// <summary>Generates a new default matrix</summary>
/// <param name="columns">Width of matrix</param>
/// <param name="rows">Height of matrix</param>
/// <returns>Matrix of specified size with all element values set to 0</returns>
public static MatrixBase <T> Default(Int32 columns, Int32 rows)
{
MatrixBase <T> defaultMatrix = new MatrixBase <T>(columns, rows);
for (Int32 i = 0; i < columns; i++)
{
for (Int32 j = 0; j < rows; j++)
{
defaultMatrix[i, j] = default(T);
}
}
return(defaultMatrix);
}
/// <summary>Performs element-wise copy of the source matrix into
/// the target matrix at the specified offset</summary>
/// <param name="sourceMatrix">Source matrix</param>
/// <param name="targetMatrix">Target matrix</param>
/// <param name="targetColumnOffset">Target column offset</param>
/// <param name="targetRowOffset">Target row offset</param>
public static void ElementWiseCopy(
MatrixBase <T> source,
MatrixBase <T> target,
Int32 targetColumnOffset,
Int32 targetRowOffset)
{
for (Int32 i = 0; i < source.ColumnCount; i++)
{
for (Int32 j = 0; j < source.RowCount; j++)
{
target[i + targetColumnOffset, j + targetRowOffset] = source[i, j];
}
}
}
/// <summary>Transposes a matrix (reflecting it across the diagonalOffset axis)
/// swapping all elements (i, i) with elements (i, i).</summary>
/// <param name="matrix">Matrix to be transposed</param>
/// <returns>Returns a transposed copy of the input matrix</returns>
public static MatrixBase <T> Transpose(MatrixBase <T> matrix)
{
MatrixBase <T> result
= new MatrixBase <T>(matrix.RowCount, matrix.ColumnCount);
for (Int32 i = 0; i < matrix.ColumnCount; i++)
{
for (Int32 j = 0; j < matrix.RowCount; j++)
{
result[j, i] = matrix[i, j];
}
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="matrix1"></param>
/// <param name="matrix2"></param>
/// <returns></returns>
public static Boolean DimensionsMatch(
MatrixBase <T> matrix1,
MatrixBase <T> matrix2)
{
if (matrix1 == null)
{
throw new ArgumentNullException("matrix1");
}
if (matrix2 == null)
{
throw new ArgumentNullException("matrix2");
}
return(matrix1.ColumnCount == matrix2.ColumnCount &&
matrix1.RowCount == matrix2.RowCount);
}
/********************/
/* PUBLIC ACCESSORS */
/********************/
/// <summary>this</summary>
/// <param name="columnIndex"></param>
/// <returns></returns>
public MatrixBase <T> this[Int32 columnIndex]
{
get
{
return(this.AsEnumerable().ElementAt(columnIndex));
}
set
{
if (value.RowCount != _dataView.RowCount || value.ColumnCount != 1)
{
throw new DimensionMismatchException();
}
MatrixBase <T> targetColumn = this.AsEnumerable().ElementAt(columnIndex);
for (int j = 0; j < value.RowCount; j++)
{
targetColumn[0, j] = value[0, j];
}
}
}
/// <summary>Performs an element-wise unary operation involving a single matrix,
/// returning the result in a new matrix instance</summary>
/// <param name="matrix">Matrix</param>
/// <param name="operation">Unary operation delegate</param>
/// <returns>Matrix instance containing the result of the unary operation</returns>
public static MatrixBase <T> ElementWiseOperation(
MatrixBase <T> matrix,
ElementPositionalUnaryOperationDelegate operation)
{
if (MatrixBase <T> .IsNull(matrix))
{
throw new ArgumentNullException("matrix");
}
MatrixBase <T> result = new MatrixBase <T>(matrix.ColumnCount, matrix.RowCount);
for (Int32 i = 0; i < result.ColumnCount; i++)
{
for (Int32 j = 0; j < result.RowCount; j++)
{
result[i, j] = operation(matrix[i, j], i, j);
}
}
return(result);
}
/********************/
/* PUBLIC ACCESSORS */
/********************/
public MatrixBase <T> this[Int32 rowIndex]
{
get
{
return(this.AsEnumerable().ElementAt(rowIndex));
}
set
{
if (value.ColumnCount != _dataView.ColumnCount || value.RowCount != 1)
{
throw new DimensionMismatchException();
}
MatrixBase <T> targetRow = this.AsEnumerable().ElementAt(rowIndex);
for (int i = 0; i < value.ColumnCount; i++)
{
targetRow[i, 0] = value[i, 0];
}
}
}
/// <summary>
///
/// </summary>
/// <param name="matricies"></param>
/// <returns></returns>
public static MatrixBase <T> JoinVertical(
IEnumerable <MatrixBase <T> > matricies)
{
int?columnCount = null;
int totalRowCount = 0;
foreach (MatrixBase <T> matrix in matricies)
{
if (MatrixBase <T> .IsNull(matrix))
{
throw new ArgumentNullException();
}
if (columnCount == null)
{
columnCount = matrix.ColumnCount;
}
else if ((int)columnCount != matrix.ColumnCount)
{
throw new DimensionMismatchException();
}
totalRowCount += matrix.RowCount;
}
MatrixBase <T> resultMatrix = new MatrixBase <T>((int)columnCount, totalRowCount);
int rowOffset = 0;
foreach (MatrixBase <T> matrix in matricies)
{
MatrixBase <T> .ElementWiseCopy(matrix, resultMatrix, 0, rowOffset);
rowOffset += matrix.RowCount;
}
return(resultMatrix);
}
/// <summary>
///
/// </summary>
/// <param name="matricies"></param>
/// <returns></returns>
public static MatrixBase <T> JoinHorizontal(
IEnumerable <MatrixBase <T> > matricies)
{
int?rowCount = null;
int totalColumnCount = 0;
foreach (MatrixBase <T> matrix in matricies)
{
if (MatrixBase <T> .IsNull(matrix))
{
throw new ArgumentNullException();
}
if (rowCount == null)
{
rowCount = matrix.RowCount;
}
else if ((int)rowCount != matrix.RowCount)
{
throw new DimensionMismatchException();
}
totalColumnCount += matrix.ColumnCount;
}
MatrixBase <T> resultMatrix = new MatrixBase <T>(totalColumnCount, (int)rowCount);
int columnOffset = 0;
foreach (MatrixBase <T> matrix in matricies)
{
MatrixBase <T> .ElementWiseCopy(matrix, resultMatrix, columnOffset, 0);
columnOffset += matrix.ColumnCount;
}
return(resultMatrix);
}
/// <summary>Creates a new matrix pointing at the same underlying data
/// set, windowed to the specified column and row ranges</summary>
/// <param name="columnRange">Sub-matrix column range</param>
/// <param name="rowRange">Sub-matrix row range</param>
/// <returns></returns>
public virtual MatrixBase <T> SubMatrix(
Int32Range columnRange,
Int32Range rowRange)
{
return(MatrixBase <T> .SubMatrix(this, columnRange, rowRange));
}
/// <summary>Swaps the order of the two specified columns in the matrix</summary>
/// <param name="row1">Column to swap</param>
/// <param name="row2">Column to swap</param>
public virtual void SwapColumns(Int32 column1, Int32 column2)
{
MatrixBase <T> .SwapColumns(this, column1, column2);
}
/// <summary>
///
/// </summary>
/// <param name="topMatrix"></param>
/// <param name="bottomMatrix"></param>
/// <returns></returns>
public static MatrixBase <T> JoinVertical(
MatrixBase <T> topMatrix,
MatrixBase <T> bottomMatrix)
{
return(MatrixBase <T> .JoinVertical(new MatrixBase <T>[] { topMatrix, bottomMatrix }));
}
/// <summary>
///
/// </summary>
/// <param name="leftMatrix"></param>
/// <param name="rightMatrix"></param>
/// <returns></returns>
public static MatrixBase <T> JoinHorizontal(
MatrixBase <T> leftMatrix,
MatrixBase <T> rightMatrix)
{
return(MatrixBase <T> .JoinHorizontal(new MatrixBase <T>[] { leftMatrix, rightMatrix }));
}
/// <summary>Indicates whether the specified Matrix is null or is empty (of rank 0)</summary>
/// <param name="matrix">Matrix</param>
/// <returns>true, if specified matrix is null or empty (of rank == 0); otherwise, false</returns>
public static Boolean IsNullOrEmpty(MatrixBase <T> matrix)
{
return(((object)matrix == null) || matrix.IsEmpty);
}
/// <summary>Indicates whether the specified matrix is null</summary>
/// <param name="matrix">Matrix</param>
/// <returns>true, if specified matrix is null; otherwise, false</returns>
public static Boolean IsNull(MatrixBase <T> matrix)
{
return((object)matrix == null);
}
/// <summary>Swaps the order of the two specified rows in the matrix</summary>
/// <param name="row1">Row to swap</param>
/// <param name="row2">Row to swap</param>
public virtual void SwapRows(Int32 row1, Int32 row2)
{
MatrixBase <T> .SwapRows(this, row1, row2);
}
