You can compare .mat files directly within the MATLAB® desktop environment using the built-in comparison tool.
Comparing Mat-Files in MATLAB
MATLAB provides a convenient graphical interface to compare the contents of two files, including .mat files. This tool helps you quickly identify differences between datasets, variable values, structures, and other data stored in the files.
The primary method to initiate a file comparison in the MATLAB desktop, as described in the reference, is straightforward:
- Go to the Home tab.
- In the File section, click Compare.
Alternatively, you might also right-click on a file in the Current Folder browser and select "Compare To..." or select two files and choose "Compare Selected Files".
Once the comparison tool opens, you will be prompted to select the two files you wish to compare. Select your two .mat files, and MATLAB will generate a report highlighting the differences.
Understanding the Comparison Results
When comparing .mat files, the tool analyzes the variables stored within them. The comparison report typically shows:
- Variable Presence: Which variables exist in one file but not the other.
- Variable Type: If a variable exists in both but has a different data type.
- Variable Size: If a variable exists in both but has different dimensions.
- Variable Value: For numerical arrays, strings, structures, cell arrays, etc., the tool can often show where the values differ. This is particularly useful for debugging or tracking changes in simulation results or data processing steps.
The comparison report usually presents the two files side-by-side, with differences highlighted visually (e.g., with different background colors or icons). You can navigate through the differences to inspect them in detail.
Here's a simplified look at potential comparison results:
| Difference Type | Description | Example Indicator |
|---|---|---|
| Added/Deleted | Variable exists in one file but not the other. | Plus/Minus icon |
| Value Changed | Variable has the same name but different data/value. | Highlighted text |
| Type Mismatch | Variable has the same name but different data type. | Icon/Text |
| Size Mismatch | Variable has the same name but different dimensions. | Icon/Text |
Using the built-in Compare tool is the most common and user-friendly way to compare .mat files in MATLAB, directly leveraging the functionality available in the desktop environment.
