--- title: "MathWorks MATLAB Numerical Computing & Algorithm AI Skill Guide (Gemini)" description: "Comprehensive operational skill specification for Google Gemini to visually diagnose, automate, script, and troubleshoot MATLAB Figure plots, Live Editor notebooks, App Designer UI layouts, and Simulink block diagrams." category: "Numerical Computing & Algorithm Development" tags: ["matlab", "matlab-figure", "live-editor-ui", "app-designer", "simulink-diagrams", "gemini", "scientific-plotting"] --- # MathWorks MATLAB Numerical Computing & Algorithm AI Skill Guide (Gemini) ## Overview & Engine Architecture MATLAB provides an interactive scientific visualization ecosystem featuring publication-quality **Figure Windows (2D/3D graphics with OpenGL hardware acceleration)**, **Live Editor (`.mlx`) interactive notebooks**, **App Designer drag-and-drop GUI canvas (`uifigure`)**, and **Simulink Model-Based block diagram canvases**. Gemini acts as an AI Scientific Visualization Specialist and Algorithm Interface Auditor, specializing in **multimodal MATLAB Figure plot inspection**, **App Designer responsive UI layout validation**, **Live Editor rich-media equation review**, and **Simulink signal flow diagnostics**. ### Visual Analytics & Technical Computing Stack ``` ┌─────────────────────────────────────────────────────────────┐ │ MATLAB Visual Operations │ │ │ │ Plotting & Figure Windows │ │ ├── 2D Line, Scatter & Bar Plots (Subplot Grids, Legends) │ │ ├── 3D Surface, Mesh & Volumetric Isosurface Viewports │ │ └── Colormap Visualizers (Parula, Turbo, Magma, Hot) │ │ │ │ Interactive Development Environments │ │ ├── Live Editor Notebooks (`.mlx` Inline Plots & LaTeX Math│ │ ├── App Designer (UIFigure, UIAxes, Sliders, Dropdowns) │ │ └── Variable Editor (2D/3D Matrix Spreadsheets & Heatmaps) │ │ │ │ Model-Based Design & Simulation │ │ ├── Simulink Canvas (Continuous/Discrete Blocks, Bus Lines)│ │ └── Scope Viewport (Multi-Signal Oscilloscope Traces) │ └─────────────────────────────────────────────────────────────┘ ``` --- ## Operational Capabilities & Agent Directives 1. **Multimodal MATLAB Figure Inspection**: Analyze screenshots of MATLAB plots to verify axis scaling (linear vs logarithmic), scientific unit labels, legend entries, tick intervals, and high-DPI rasterization quality. 2. **App Designer UI Layout Validation**: Review custom App Designer layouts to ensure UI components (buttons, text areas, axes) maintain proportional auto-reflow across varying screen resolutions. 3. **Simulink Block Diagram Diagnostics**: Inspect Simulink models to detect broken signal lines (red dashed wires), sample rate conflicts (color-coded sample times), and algebraic loop warnings. 4. **Publication-Quality Graphics Export**: Guide users in utilizing `exportgraphics()` with vector output formats (PDF/EPS) and specified DPI targets ($300-600\text{ DPI}$). --- ## Production Python Automation: Automated MATLAB MAT-File Binary Inspector (`scipy.io`) Run this script to inspect variable names, data types, and array shapes stored inside MATLAB `.mat` binary files without needing a MATLAB license: ```python """ MATLAB .mat Binary File Structure Inspector (scipy.io) Parses Level 5 and HDF5-based MAT-files to extract variable arrays, dimensions, and types. """ import sys import os import numpy as np def inspect_mat_file(file_path: str): if not os.path.exists(file_path): print(f"Error: MAT file '{file_path}' not found.") return print(f"--- [INSPECTING MATLAB .MAT FILE: {file_path}] ---") # Attempt Level 5 MAT-File read via scipy.io try: import scipy.io as sio mat_data = sio.loadmat(file_path) print("Format: Level 5 MAT-File (v7 / v6)\n") print("--- [WORKSPACE VARIABLES DETECTED] ---") for key, val in mat_data.items(): if not key.startswith("__"): shape_str = str(val.shape) if hasattr(val, "shape") else "Scalar" dtype_str = str(val.dtype) if hasattr(val, "dtype") else type(val).__name__ print(f"• Variable: {key:<20} | Shape: {shape_str:<14} | Type: {dtype_str}") print("\n✅ Level 5 MAT-file successfully parsed.") return except NotImplementedError: print("Notice: Detected MATLAB v7.3 HDF5 MAT-file format. Using h5py...") except Exception as e: print(f"Standard parser notice: {e}. Trying h5py...") # Attempt v7.3 HDF5 MAT-File read via h5py try: import h5py with h5py.File(file_path, "r") as f: print("Format: MATLAB v7.3 (HDF5 Architecture)\n") print("--- [HDF5 DATASETS DETECTED] ---") for key in f.keys(): ds = f[key] print(f"• Dataset: {key:<20} | Shape: {str(ds.shape):<14} | Type: {ds.dtype}") print("\n✅ v7.3 HDF5 MAT-file parsed successfully.") except ImportError: print("Install 'h5py' to inspect MATLAB v7.3 format files (run: pip install h5py).") except Exception as e: print(f"Failed to read file: {e}") if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 inspect_mat.py ") sys.exit(1) inspect_mat_file(sys.argv[1]) ``` --- ## Technical Troubleshooting Matrix | Issue & Visual Signature | Root Cause Analysis | Diagnostic & Resolution Pathway | | :--- | :--- | :--- | | **Figure Text Renders Pixelated / Blurry in PDF Export** | Used `saveas(gcf, 'plot.png')` or low-resolution raster snapshot. | Use modern vector export: `exportgraphics(gcf, 'plot.pdf', 'ContentType', 'vector')`. | | **Simulink Shows "Algebraic loop detected" Error** | Direct feedthrough in a feedback loop without an intervening unit delay block. | Insert a **Unit Delay ($z^{-1}$)** block into the feedback path or enable algebraic loop solver in Model Settings. | | **App Designer UI Distorts on Resizing** | Components positioned with absolute pixel coordinates rather than inside a Grid Layout. | Select UI elements $\rightarrow$ Right-click $\rightarrow$ **Group into Grid Layout** $\rightarrow$ Configure row/column sizing to `1x` (flexible). | | **Live Editor LaTeX Formula Displays Red Syntax Error** | Malformed LaTeX math syntax inside Live Editor equation block. | Check equation delimiters (e.g. `\frac{a}{b}` rather than invalid syntax). | --- ## Command Line Syntax & Server Control ```bash # Launch MATLAB with GUI matlab # Export High-Resolution Plot from Headless M-Script # (exportgraphics(gcf, 'output.png', 'Resolution', 300)) ``` ### Key Configuration Locations - **MATLAB Figures**: `*.fig` - **Live Scripts**: `*.mlx` - **Simulink Models**: `*.slx` --- ## Agent Operational Directive > **MANDATORY**: For publication figures in MATLAB, always utilize `exportgraphics(gcf, 'figure.pdf', 'ContentType', 'vector')` rather than `print` or `saveas` to guarantee lossless vector typography and crisp line art.