https://github.com/swvanbuuren/cubinterpp

Multidimensional cubic and linear interpolation in modern C++ with Python support
https://github.com/swvanbuuren/cubinterpp

1d-interpolation 2d-interpolation 3d-interpolation akima cpp cpp23 cubic-interpolation header-only interpolation linear-interpolation mdspan multi-dimensional-interpolation multidimensional-interpolation multivariate-interpolation piecewise-polynomial pybind11 python spline spline-interpolation submdspan

Last synced: 27 days ago
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Multidimensional cubic and linear interpolation in modern C++ with Python support

• Host: GitHub
• URL: https://github.com/swvanbuuren/cubinterpp
• Owner: swvanbuuren
• License: mit
• Created: 2022-12-26T18:45:29.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2026-01-20T19:43:22.000Z (about 1 month ago)
• Last Synced: 2026-01-21T04:43:57.604Z (about 1 month ago)
• Topics: 1d-interpolation, 2d-interpolation, 3d-interpolation, akima, cpp, cpp23, cubic-interpolation, header-only, interpolation, linear-interpolation, mdspan, multi-dimensional-interpolation, multidimensional-interpolation, multivariate-interpolation, piecewise-polynomial, pybind11, python, spline, spline-interpolation, submdspan
• Language: C++
• Homepage: https://swvanbuuren.github.io/cubinterpp/
• Size: 1.87 MB
• Stars: 5
• Watchers: 1
• Forks: 1
• Open Issues: 12
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# cubinterpp

`N`-dimensional cubic and linear interpolation in modern C++ with Python

support.

| ![Comparison of 1D interpolation types](docs/images/comparison_1D.svg) |

|:--:|

| *1D interpolation* |

| ![Linear interpolation](docs/images/linear_2D.png) |  ![Monotonic spline interpolation](docs/images/monotonic_2D.png) | 

|:--:|:--:| 

| *2D Linear interpolation* | *2D Monotonic cubic spline interpolation* |

| ![2D Akima spline interpolation](docs/images/akima_2D.png) |  ![2D Natural spline interpolation](docs/images/natural_spline_2D.png) | 

|:--:|:--:| 

| *2D Akima spline interpolation* | *2D Natural spline interpolation* |

## Introduction

This C++ header library features tools for piecewise linear and cubic

interpolation in `N` dimensions.

For cubic piecewise interpolation, the library features three types:

- Monotone cubic interpolation

- Akima spline interpolation 

- Natural cubic spline interpolation

All classes are templatized and support the STL's vector types.

The accompanying python script in [cubinterpp ](cubinterpp ) compares the

interpolation types.

Refer to the [documentation](https://swvanbuuren.github.io/cubinterpp/) for:

- [Requirements](https://swvanbuuren.github.io/cubinterpp/requirements/)

- [Usage instructions](https://swvanbuuren.github.io/cubinterpp/usage/)

  - [Single header file](https://swvanbuuren.github.io/cubinterpp/usage#single-header-library)

  - [Build from source](https://swvanbuuren.github.io/cubinterpp/usage#build-from-source)

- [Mathematical background](https://swvanbuuren.github.io/cubinterpp/theory/)

- [Code reference](https://swvanbuuren.github.io/cubinterpp/reference/)

## License

An MIT style license applies for cubinterpp, see the [LICENSE](LICENSE) file for

more details.