Complete EMD Version (Including Main Program Documentation in English and hhspectrum Error Fixes)

This documentation presents the complete EMD (Empirical Mode Decomposition) package featuring comprehensive English explanations of the main program and essential corrections for the hhspectrum function. The implementation includes detailed algorithm descriptions for the sifting process used in IMF (Intrinsic Mode Function) extraction, with code-level explanations of boundary condition handling and stopping criteria. The main program documentation covers function parameters for data input, IMF number specification, and visualization options, enabling more effective EMD-based data analysis and signal processing. The corrected hhspectrum function now properly handles Hilbert transform computations for instantaneous frequency analysis, addressing previous issues with edge effects and frequency resolution. This enhanced version provides robust numerical implementation of the EMD algorithm with improved numerical stability, making it a valuable tool for achieving superior results in signal processing and data analysis applications.