Hi Fangping,
In MATLAB, different workspaces and data storage methods serve different purposes. Here's an overview of the various types of workspaces and data spaces you mentioned:
1. Base Workspace (WorkSpace)
The base workspace is the main workspace in MATLAB where variables created at the command line or in scripts (not functions) are stored. It is accessible from the MATLAB command window and any script that is not a function. https://www.mathworks.com/help/matlab/workspace.html
2. Model Workspace (ModelSpace)
The model workspace is specific to Simulink models. Each Simulink model has its own workspace that is used to store variables and data specific to that model. This workspace is separate from the base workspace and is useful for keeping model-specific data isolated. https://www.mathworks.com/help/simulink/ug/using-model-workspaces.html
3. SLDD (Simulink Data Dictionary)
The Simulink Data Dictionary (SLDD) is a repository for storing design data, such as parameters, signals, and bus objects, that are used by Simulink models. It allows for centralized management of data, which can be shared across multiple models. https://www.mathworks.com/help/simulink/ug/store-data-in-dictionary-programmatically.html
4. Function Workspace
Each function in MATLAB has its own local workspace. Variables defined within a function are local to that function and are not accessible from the base workspace or other functions. This encapsulation helps prevent variable name conflicts and unintended interactions between different parts of a program. https://www.mathworks.com/help/matlab/matlab_prog/base-and-function-workspaces.html
