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Eigen is a C++ template library for linear algebra
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# Eigen: A Header-Only Linear Algebra Library for ESP-IDF
[](https://components.espressif.com/components/espressif/eigen)
[Eigen](https://libeigen.gitlab.io/) is a header-only C++ library for linear algebra. It provides matrices, vectors, numerical solvers, decompositions, geometry, and related algorithms.
## Component status
- Provides Eigen's header-only C++ API and modules.
- Requires ESP-IDF 5.0 or newer and C++14 or newer.
- Does not build or provide the optional BLAS/LAPACK compatibility libraries in the upstream repository.
## Usage
Add the component as a dependency:
```yaml
dependencies:
espressif/eigen: "^5.0.1"
```
This component provides the upstream Eigen API without ESP-IDF-specific wrappers.
Include Eigen headers directly from a C++ source file. For the complete Eigen API, include the umbrella header:
```cpp
#include "Eigen/Eigen"
void calculate()
{
Eigen::Matrix2f matrix;
matrix << 1.0f, 2.0f,
3.0f, 4.0f;
}
```
For smaller builds, include only the modules that are needed, for example `"Eigen/Core"`, `"Eigen/Dense"`, or `"Eigen/Geometry"`.
See the [get-started example](examples/get_started/) for a complete ESP-IDF project.
## Learn more
For API documentation and usage details, refer to the upstream Eigen documentation:
- [Eigen documentation](https://libeigen.gitlab.io)
- [Eigen repository](https://gitlab.com/libeigen/eigen)
Links
- Homepage
- Documentation
-
Repository
a9149818ea86a30f8d10c18142e1fc05cf4817f9
- Issues
- License
Supports all targets
To add this component to your project, run:
download archive
idf.py add-dependency "espressif/eigen^5.0.1"
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