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https://github.com/nelson-lang/nelson

The Nelson Programming Language
https://github.com/nelson-lang/nelson

cpp17 data-science data-structures interpreter mathematical-functions matlab matrix-functions nelson octave programming-language scientific-computing scilab

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The Nelson Programming Language

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# 🚀 The Nelson language



The main homepage for Nelson can be found at [https://nelson-lang.github.io/nelson-website/](https://nelson-lang.github.io/nelson-website/).



## 🌟 **Starring the repository**



If you found this project useful, please consider [starring it on GitHub !!!](https://github.com/nelson-lang/nelson/stargazers) This allows me to see how many people are using my code, and motivates me to keep working to improve it.



## 🎓 **Introduction**



Nelson is a powerful, open-source numerical computational language, developed to provide a comprehensive and intuitive environment for engineers, scientists, and students. With over 1,200 built-in functions, Nelson supports a wide range of tasks, from basic algebra to advanced numerical simulations.



Originally inspired by languages like MATLAB© and GNU Octave, Nelson offers users a lightweight yet feature-rich experience. It is designed to be easy to learn and use, with an emphasis on performance and flexibility.



![Nelson environment](https://github.com/nelson-lang/nelson-website/blob/master/images/Nelson-windows.png?raw=true)



## 🛠️ **Features**



### Data Types Managed by Nelson



- **Double and Complex Double**: Supports scalars, vectors, 2D matrices, N-dimensional arrays, and sparse matrices.

- **Single and Complex Single**: Includes scalars, vectors, 2D matrices, N-dimensional arrays, and sparse matrices.

- **Logical**: Handles scalars, vectors, 2D matrices, N-dimensional arrays, and sparse matrices.

- **Character Arrays**: Supports UNICODE characters.

- **String Arrays**: Fully supports UNICODE.

- **Integers**: 8, 16, 32, and 64-bit signed and unsigned scalars, vectors, 2D matrices, and N-dimensional arrays.

- **Handle Objects**: For object-oriented functionality.

- **Anonymous Functions**: Allows creation and manipulation of functions without names.

- **Data Structures**: Supports dictionaries and tables.

- **Overloading**: All types can be overloaded for custom behavior.



### Performance Enhancements



- **OpenMP and SIMD**: Utilizes parallel processing and vectorization for faster computations.



### Visualization & Interface



- **2D and 3D Plotting**: High-level commands for visualizations.

- **User Interface Controls**: Built-in controls for creating custom interfaces.

- **Desktop Environment**: Comes with history tracking, a file explorer, and workspace browser.



### Advanced Modules



- **Parallel Computing**: Enables efficient use of multi-core processors.

- **Fast Fourier Transform (FFT)**: High-performance FFT functions based on FFTW and MKL.

- **SLICOT Interface**: Optional support for the Systems and Control Theory subroutine library.

- **Control System Module**: Tools for control theory and system design.

- **MPI (Message Passing Interface)**: Functions for distributed parallel computing.



### Data Formats & Interfacing



- **JSON Support**: Read and write JSON files.

- **HDF5 Functions**: High-level I/O functions, with HDF5 as the default file format for `.nh5` workspaces.

- **MAT-File Compatibility**: Load and save workspaces in MAT-file format.

- **Foreign Function Interface (FFI)**: Build and load C/Fortran code on the fly.

- **MEX C API Compatibility**: Interfacing with MEX-compatible C APIs.

- **Nelson Engine API**: Use Nelson as a backend engine within C code, compatible with the MEX Engine API.

- **Python Interfacing**: Call Python scripts and functions from Nelson.

- **RESTful API**: Enables Nelson to interact with web services.



### Additional Capabilities



- **Inter-Process Communication**: Communicate between Nelson processes.

- **QML Engine**: Use Qt’s QML framework to display and manipulate graphical content.

- **Component Object Model (COM)**: Interface with COM components, especially on Windows.

- **Excel File Support**: Write and read `.xlsx` files using COM on Windows.

- **Embedded Code Editor**: Integrated editor for Nelson scripts.



### Help & Testing Tools



- **Help Engine**: Generate and view help files in various formats like HTML, Markdown, PDF, or GitBook.

- **Test Engine**: Validate algorithms using built-in functions, with support for xUnit report export.



### Profiling & Code Coverage



- **Profiler**: Built-in profiler to analyze and optimize code performance.

- **Code Coverage**: Measure the coverage of your tests to ensure thorough validation.



### Cloud & Extensibility



- **Nelson Cloud**: Instant access to Nelson from any web browser via [Nelson Cloud](https://www.npmjs.com/package/nelson-cloud).

- **Module Skeleton**: Templates for extending Nelson:

  - [Template with Macros and Builtins](https://github.com/nelson-lang/module_skeleton).

  - [Basic Macros Template](https://github.com/nelson-lang/module_skeleton_basic).

- **Nelson Modules Manager (nmm)**: A package manager to install and manage extensions for Nelson.



## 📥 **Download**



[![Get it from the Snap Store](https://snapcraft.io/static/images/badges/en/snap-store-black.svg)](https://snapcraft.io/nelson)



[Latest Windows Installer](https://github.com/nelson-lang/nelson/releases)



[Get it from the Windows Package Manager](https://winstall.app/apps/NelsonNumericalSoftware.Nelson)



[Get it from the Chocolatey Package Manager](https://community.chocolatey.org/packages/nelson)



## 📚 **Resources**



- **Homepage:** 

- **GitBook:** 

- **Documentation:** 

- **Source code:** 

- **Binaries:** 

- **Docker:** 

- **Gitter:** 

- **YouTube:** 

- **Twitter:** 

- **LinkedIn:** 



## 📜 **License**



Nelson is delivered under dual-license:



- [![License (GNU Lesser General Public License (LGPL) v3.0)]()](https://opensource.org/licenses/LGPL-3.0)



  or



- [![License (GNU General Public License (GPL) v3.0)]()](https://opensource.org/licenses/GPL-3.0)



## 💻 **Supported Platforms**



Nelson is tested and supported on a wide range of platforms. **[Downloads](https://github.com/nelson-lang/nelson/releases)** options and **[continuous integration (CI)](https://github.com/nelson-lang/nelson/actions/workflows/ccpp.yml)** status are listed below:



| **Operating System** |  **Architecture**  | **CI** | **Binaries** |

| :------------------: | :----------------: | :----: | :----------: |

|  **Windows 10, 11**  |    x86-64, i686    |   ✓    |      ✓       |

|  **macOS Sequoia**   |       arm64        |   ✓    |              |

|   **macOS Sonoma**   |       arm64        |   ✓    |              |

|  **macOS Ventura**   |  x86-64 (64-bit)   |   ✓    |              |

|   **Ubuntu 24.04**   |       x86-64       |   ✓    |   ✓ (Snap)   |

|   **Ubuntu 24.04**   | arm64 (cobalt 100) |   ✓    |   ✓ (Snap)   |

|   **Ubuntu 22.04**   |       x86-64       |   ✓    |   ✓ (Snap)   |

|   **Ubuntu 20.04**   |       x86-64       |   ✓    |   ✓ (Snap)   |

|    **Fedora 40**     |       x86-64       |   ✓    |   ✓ (Snap)   |

|    **ArchLinux**     |       x86-64       |   ✓    |   ✓ (Snap)   |

|     **Raspbian**     |  ARM v8 (64-bit)   |        |              |



_Note: The continued support of some platforms may depend on community contributions._



Allan CORNET ([email protected])