public static MatrixNodeI multiply(MatrixNodeI m1, MatrixNodeI m2) { assert (m1.getDim().is2D()); assert (m2.getDim().is2D()); assert (m1.getDim().getLastDim() == m2.getDim().getFirstDim()); int m = m1.getDim().getFirstDim(); int n = m1.getDim().getLastDim(); int p = m2.getDim().getLastDim(); Node[] entry = new Node[m * p]; int index = 0; try { for (int i = 0; i < m; ++i) { for (int j = 0; j < p; ++j) { Node node = zero; for (int k = 0; k < n; ++k) { Node item = factory.buildOperatorNode(op.getMultiply(), get(m1, i, k), get(m2, k, j)); node = factory.buildOperatorNode(op.getAdd(), node, item); } entry[index] = simplifier.simplify(node); ++index; } } } catch (ParseException e) { } return (MatrixNodeI) factory.buildOperatorNode(op.getMList(), entry, Dimensions.valueOf(m, p)); }
public static Node get(MatrixNodeI m, int row, int col) { return m.jjtGetChild(row * m.getDim().getLastDim() + col); }