public override void layMatrixAt(Matrix<double> subMatrix, int i, int j)
{
checkPositive(i,j);
checkBounds(i + subMatrix.RowCount, j + subMatrix.ColumnCount);
for(int k=0; k<subMatrix.RowCount; k++)
for(int m=0; m<subMatrix.ColumnCount; m++)
this.setItemAt(i+k, j+m, subMatrix.getItemAt(k,m));
}
protected override Matrix<double> sum(Matrix<double> another)
{
if (this.rows != another.RowCount || this.columns != another.ColumnCount)
throw new ArgumentException("Matrices must be of the same size in order to sum.");
// If the matrix is SDA, we can do it quick'n'lucky.
if (this.GetType().IsInstanceOfType(another))
{
Matrix_SDA temp = (Matrix_SDA)another;
Matrix_SDA newMatrix = new Matrix_SDA(this.rows, this.columns);
for (int i = 0; i < this.ElementCount; i++)
newMatrix.matrixArray[i] = this.matrixArray[i] + temp.matrixArray[i];
return newMatrix;
}
// Here comes the bad case
else
{
Matrix_SDA newMatrix = new Matrix_SDA(this.rows, this.columns);
for (int i = 0; i < this.ElementCount; i++)
newMatrix.matrixArray[i] = this.matrixArray[i] + another.getItemAt(i / columns, i % columns);
return newMatrix;
}
}
