MATLAB Program for Plotting Spectrum Diagrams

This MATLAB program generates spectrum diagrams for various types of waveforms. The implementation begins by reading input waveform data using MATLAB's file handling functions. The core algorithm employs Fast Fourier Transform (FFT) through MATLAB's built-in fft() function to convert time-domain signals into frequency-domain representations. The program includes waveform type detection logic that automatically adjusts FFT parameters based on input characteristics. For visualization, it utilizes MATLAB's plotting functions with configurable parameters including axis labels, tick marks, and scaling options to ensure optimal readability. Key functions like xlabel(), ylabel(), and title() are implemented with dynamic text generation based on waveform properties. The plotting section incorporates amplitude scaling and frequency normalization algorithms to handle different sampling rates and signal amplitudes. Users can modify parameters such as window size, overlap percentage, and frequency range through a configuration structure within the code. Finally, the program saves generated spectra to specified directories using MATLAB's saveas() or imwrite() functions, supporting multiple formats (PNG, JPEG, PDF) for further analysis. The output files include metadata preserving waveform parameters and processing settings. This program provides an efficient workflow for spectral analysis, enabling users to visualize frequency characteristics of various signals with customizable parameters and automated saving capabilities, significantly improving data processing efficiency and analytical accuracy.