public void add(double a, Matrix B) throws MatricksException {
if (B.numRows() != this.numRows() && B.numCols() != this.numCols()) {
throw new MatricksException("incompatible size for addition");
}
MatrixCursor cursor = B.cursor();
while (cursor.next()) {
final int row = cursor.row();
final int col = cursor.col();
double v = a * cursor.val() + this.get(row, col);
this.set(row, col, v);
}
}
