Enhance & Fix Existing Matlab Code

I require a Matlab expert to extend the functionalities of my current code, which includes GUIs and data visualisations. The primary focus will be on enhancing data processing algorithms, user interface elements, and data visualisation methods. There are also some logical errors in the code that need to be addressed.

Key Tasks:
- Extend functionalities of existing Matlab code
- Fix logical errors
- Improve data processing algorithms
- Enhance user interface elements
- Upgrade data visualisation methods

Ideal Skills:
- Expertise in Matlab programming
- Proficient in GUI development
- Experienced in data visualisation techniques
- Strong problem-solving skills for logical errors
- Ability to understand and extend existing code