'How do you install Eigen?
I'm a complete beginner at Eigen, including headers and coding in general. I tried installing Eigen's libraries to do some stuff in Visual Studio Code but I can't find the solution, or rather I don't understand what the answers mean.
I have downloaded the zip from the site but don't know what to do with it. My main question is, should you not be able to see the definition to #include <eigen3/Eigen/Dense> in vscode? Because I can't and I don't understand if I'm supposed to.
I hear many of the answers say "Eigen c++ is a header only library: you don't have to install it, you just download it, unzip it and link your code against it." so does that mean i need to place the Eigen/Dense files in the default include? Because when I do I can't find them when I right click on /Dense> in the include code. Do I include them in my environment variables?
Solution 1:[1]
You need to add the directory to which you copied Eigen to the include path of your project. After this #include<Eigen/Dense> should work.
Please google "visual C++ add directory to include path" to see how this is done.
Solution 2:[2]
1. Download Eigen
$ wget -O Eigen.zip https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.zip
2. Extract and copy to /usr/local/include
$ unzip Eigen.zip # it has unzipped into the library called eigen-3.4.0
$ sudo cp -r eigen-3.4.0/Eigen /usr/local/include
Now you can compile your source files
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | dnet |
| Solution 2 | Levon Minasian |