20 lines
591 B
C++
20 lines
591 B
C++
MatrixXf mat(2,2);
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mat << 1, 2, 4, 7;
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cout << "Here is the matrix mat:\n" << mat << endl << endl;
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mat = 2 * mat;
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cout << "After 'mat = 2 * mat', mat = \n" << mat << endl << endl;
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mat = mat - MatrixXf::Identity(2,2);
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cout << "After the subtraction, it becomes\n" << mat << endl << endl;
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ArrayXXf arr = mat;
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arr = arr.square();
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cout << "After squaring, it becomes\n" << arr << endl << endl;
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// Combining all operations in one statement:
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mat << 1, 2, 4, 7;
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mat = (2 * mat - MatrixXf::Identity(2,2)).array().square();
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cout << "Doing everything at once yields\n" << mat << endl << endl;
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