| Austin Schuh | 189376f | 2018-12-20 22:11:15 +1100 | [diff] [blame^] | 1 | SparseMatrix<double> A(3,3); |
| 2 | A.insert(1,2) = 0; | ||||
| 3 | A.insert(0,1) = 1; | ||||
| 4 | A.insert(2,0) = 2; | ||||
| 5 | A.makeCompressed(); | ||||
| 6 | cout << "The matrix A is:" << endl << MatrixXd(A) << endl; | ||||
| 7 | cout << "it has " << A.nonZeros() << " stored non zero coefficients that are: " << A.coeffs().transpose() << endl; | ||||
| 8 | A.coeffs() += 10; | ||||
| 9 | cout << "After adding 10 to every stored non zero coefficient, the matrix A is:" << endl << MatrixXd(A) << endl; | ||||