Hi Phil,
I discovered this morning that I messed up the bug fix, it just created another. The correct code is here under....:
RealMatrix getSubMatrix (int startRow, int endRow, int startColumn, int endColumn)
/**
* Get a submatrix. Rows and columns are indicated
* counting from 0 to n-1.
*
* @param startRow Initial row index
* @param endRow Final row index
* @param startColumn Initial column index
* @param endColumn Final column index
* @return The subMatrix containing the data of the
* specified rows and columns
* @exception MatrixIndexException matrix dimension
* mismatch
*/
public RealMatrix getSubMatrix(int startRow, int endRow, int startColumn,
int endColumn) throws MatrixIndexException
{
RealMatrix subMatrix = new RealMatrix(endRow - startRow,
endColumn - startColumn);
double[][] subMatrixData = subMatrix.getDataRef();
try
{
for (int i = startRow; i < endRow; i++)
{
for (int j = startColumn; j < endColumn; j++)
{
subMatrixData[i - startRow][j - startColumn] = data[i][j];
}
}
}
catch (ArrayIndexOutOfBoundsException e)
{
throw new MatrixIndexException("matrix dimension mismatch");
}
return subMatrix;
}-- http://www.kimvdlinde.com
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