/**
* Creates a new iterator for traversing through a submatrix inside this matrix. It can be traversed
* by row or by column. Range of elements is inclusive, e.g. minRow = 0 and maxRow = 1 will include rows
* 0 and 1. The iteration starts at (minRow,minCol) and ends at (maxRow,maxCol)
*
* @param a the matrix it is iterating through
* @param rowMajor true means it will traverse through the submatrix by row first, false by columns.
* @param minRow first row it will start at.
* @param minCol first column it will start at.
* @param maxRow last row it will stop at.
* @param maxCol last column it will stop at.
*/
public DMatrixIterator(DMatrixD1 a, bool rowMajor,
int minRow, int minCol, int maxRow, int maxCol
)
{
if (maxCol < minCol)
throw new ArgumentException("maxCol has to be more than or equal to minCol");
if (maxRow < minRow)
throw new ArgumentException("maxRow has to be more than or equal to minCol");
if (maxCol >= a.numCols)
throw new ArgumentException("maxCol must be < numCols");
if (maxRow >= a.numRows)
throw new ArgumentException("maxRow must be < numCRows");
this.a = a;
this.rowMajor = rowMajor;
this.minCol = minCol;
this.minRow = minRow;
size = (maxCol - minCol + 1) * (maxRow - minRow + 1);
if (rowMajor)
submatrixStride = maxCol - minCol + 1;
else
submatrixStride = maxRow - minRow + 1;
}
/// <summary>
/// Sets the value of this matrix to be the same as the value of the provided matrix. Both
/// matrices must have the same shape:<br>
/// <br>
/// a<sub>ij</sub> = b<sub>ij</sub><br>
/// <br>
/// </summary>
/// <param name="b"> The matrix that this matrix is to be set equal to. </param>
public virtual void setTo(DMatrixD1 b)
{
if (numRows != b.numRows || numCols != b.numCols)
{
throw new MatrixDimensionException("The two matrices do not have compatible shapes.");
}
int dataLength = b.DataLength;
Array.Copy(b.data, 0, this.data, 0, dataLength);
}
