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dlma/eigen-3.4.0/doc/examples/tut_arithmetic_add_sub.cpp
68bb631292e1master

tut_arithmetic_add_sub.cpp
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			#include <iostream>
			#include <Eigen/Dense>

			using namespace Eigen;

			int main()
			{
			Matrix2d a;
			a << 1, 2,
			3, 4;
			MatrixXd b(2,2);
			b << 2, 3,
			1, 4;
			std::cout << "a + b =\n" << a + b << std::endl;
			std::cout << "a - b =\n" << a - b << std::endl;
			std::cout << "Doing a += b;" << std::endl;
			a += b;
			std::cout << "Now a =\n" << a << std::endl;
			Vector3d v(1,2,3);
			Vector3d w(1,0,0);
			std::cout << "-v + w - v =\n" << -v + w - v << std::endl;
			}