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10 lines
411 B
10 lines
411 B
2 years ago
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SparseMatrix<double> A(3,3);
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A.insert(1,2) = 0;
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A.insert(0,1) = 1;
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A.insert(2,0) = 2;
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A.makeCompressed();
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cout << "The matrix A is:" << endl << MatrixXd(A) << endl;
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cout << "it has " << A.nonZeros() << " stored non zero coefficients that are: " << A.coeffs().transpose() << endl;
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A.coeffs() += 10;
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cout << "After adding 10 to every stored non zero coefficient, the matrix A is:" << endl << MatrixXd(A) << endl;
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