1 | #include <Eigen/Dense>
|
---|
2 | #include <iostream>
|
---|
3 |
|
---|
4 | using namespace Eigen;
|
---|
5 | using namespace std;
|
---|
6 |
|
---|
7 | int main(int, char**)
|
---|
8 | {
|
---|
9 | cout.precision(3);
|
---|
10 | const int size = 6;
|
---|
11 | MatrixXd mat1(size, size);
|
---|
12 | mat1.topLeftCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2);
|
---|
13 | mat1.topRightCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2);
|
---|
14 | mat1.bottomLeftCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2);
|
---|
15 | mat1.bottomRightCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2);
|
---|
16 | std::cout << mat1 << std::endl << std::endl;
|
---|
17 |
|
---|
18 | MatrixXd mat2(size, size);
|
---|
19 | mat2.topLeftCorner(size/2, size/2).setZero();
|
---|
20 | mat2.topRightCorner(size/2, size/2).setIdentity();
|
---|
21 | mat2.bottomLeftCorner(size/2, size/2).setIdentity();
|
---|
22 | mat2.bottomRightCorner(size/2, size/2).setZero();
|
---|
23 | std::cout << mat2 << std::endl << std::endl;
|
---|
24 |
|
---|
25 | MatrixXd mat3(size, size);
|
---|
26 | mat3 << MatrixXd::Zero(size/2, size/2), MatrixXd::Identity(size/2, size/2),
|
---|
27 | MatrixXd::Identity(size/2, size/2), MatrixXd::Zero(size/2, size/2);
|
---|
28 | std::cout << mat3 << std::endl;
|
---|
29 |
|
---|
30 |
|
---|
31 | return 0;
|
---|
32 | }
|
---|