Eigen matrix2Xf
时间: 2023-08-12 19:01:35 浏览: 51
Eigen::Matrix2Xf is a dynamic-size matrix class in the Eigen library, specifically designed for floating-point types. It represents a matrix with 2 rows and a variable number of columns, where the number of columns can be determined at runtime. The 'X' in Matrix2Xf denotes the dynamic nature of the size.
Here's an example of creating and using an Eigen::Matrix2Xf:
```cpp
#include <iostream>
#include <Eigen/Dense>
int main() {
Eigen::Matrix2Xf matrix(2, 3);
// Assigning values to the matrix
matrix << 1, 2, 3,
4, 5, 6;
// Accessing individual elements
std::cout << "Element at (0, 1): " << matrix(0, 1) << std::endl;
// Modifying an element
matrix(1, 2) = 7;
// Printing the entire matrix
std::cout << "Matrix:\n" << matrix << std::endl;
return 0;
}
```
In this example, we create a Matrix2Xf object with 2 rows and 3 columns. We then assign values to the matrix using the comma-separated initializer list. Individual elements can be accessed using the parentheses operator, and modified in the same way. Finally, we print the entire matrix using the stream insertion operator (<<).
Please note that Eigen is a powerful C++ library for linear algebra and provides various functionalities for matrix operations. The Matrix2Xf class is just one of many useful classes provided by Eigen.
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