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QLab is a project that aims to develop a MATLAB-like engine for doing calculations, with some added features and advantages.

The main idea behind the Qlab project is to develop open source software which will support complex mathematical calculations. It is being developed by Faculty of Mathematics, University of Belgrade and it's supported by Microsoft Academic Community Serbia. The project is written on .NET platform. It is published under MS-RpL.

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Developers are students under the leadership of faculty professors. They are divided into teams and in order to usethe full potential of the faculty, students from all sections and modules are included in the development.

Initial set of Qlab functionalitites is based on those of MATLAB, but one of the main goals is to expand that set and to develop more comprehensive mathematical software which will be released under Open source licence. In addition, Qlab adheres all MATLAB standards, so every program written in MATLAB will have no problems executing in Qlab, and vice versa.

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• Coordinators
• Developers
• Contributors

 

Implementation

      Qlab is developed on Microsoft .NET platform, language used is C#. Development environment is Microsoft Visual Studio and .NET Framework version used is 4.0. Project is divided into 4 sub-projects: parser, basic mathematical operations, engine and GUI. Each of them is being developed independently, with respect to standards of communication which were defined earlier. This kind of project organization secured modularity of the project and simplified it's organization. Also, it allows us to add new features and improvements in the future without modifying the entire project. More precisely, if new features or improvements are added to one of the sub-projects, only that one will be modified and, with respect to communication standards, the rest of the application will continue to work. This is a very important feature, especially if we take into consideration the fact that Qlab is an open source project and that anyone can add new features.

      The process of execution goes as follows: a user defines functions and scripts he wants to use in the GUI. When a command is called or a function is executed, GUI passes the command to the engine. Engine parses the command and functions and scripts needed for the execution, and based on the syntax tree and basic mathematical operations executes the command. Result is then sent back to the GUI which displays it to the user.

      For parsing we used Gardens Point Parser Generator, developed on Queensland university in Brisbane, Australia, which is also open source. It translates standard lex/yacc grammars to C# library which parses text. Parsed text is returned in the shape of a syntax tree.

 

License

Microsoft Reciprocal License (Ms-RL)

This license governs use of the accompanying software. If you use the software, you accept this license. If you do not accept the license, do not use the software.

1. Definitions

The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning here as under U.S. copyright law.

A "contribution" is the original software, or any additions or changes to the software.

A "contributor" is any person that distributes its contribution under this license.

"Licensed patents" are a contributor's patent claims that read directly on its contribution.

2. Grant of Rights

(A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution or any derivative works that you create.

(B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution in the software or derivative works of the contribution in the software.

3. Conditions and Limitations

(A) Reciprocal Grants- For any file you distribute that contains code from the software (in source code or binary format), you must provide recipients the source code to that file along with a copy of this license, which license will govern that file. You may license other files that are entirely your own work and do not contain code from the software under any terms you choose.

(B) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.

(C) If you bring a patent claim against any contributor over patents that you claim are infringed by the software, your patent license from such contributor to the software ends automatically.

(D) If you distribute any portion of the software, you must retain all copyright, patent, trademark, and attribution notices that are present in the software.

(E) If you distribute any portion of the software in source code form, you may do so only under this license by including a complete copy of this license with your distribution. If you distribute any portion of the software in compiled or object code form, you may only do so under a license that complies with this license.

(F) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties, guarantees or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a particular purpose and non-infringement.