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13 lines
534 B
C++
13 lines
534 B
C++
MatrixXd A(3, 3);
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A << 4, -1, 2, -1, 6, 0, 2, 0, 5;
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cout << "The matrix A is" << endl << A << endl;
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LLT<MatrixXd> lltOfA(A); // compute the Cholesky decomposition of A
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MatrixXd L = lltOfA.matrixL(); // retrieve factor L in the decomposition
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// The previous two lines can also be written as "L = A.llt().matrixL()"
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cout << "The Cholesky factor L is" << endl << L << endl;
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cout << "To check this, let us compute L * L.transpose()" << endl;
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cout << L * L.transpose() << endl;
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cout << "This should equal the matrix A" << endl;
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