Module frequency 

Frequency domain and spectral analysis features for time series

This module provides comprehensive frequency domain feature extraction including FFT analysis, power spectral density estimation, spectral peak detection, frequency band analysis, and advanced periodogram methods.

Structs

EMDFeatures

Placeholder EMD features (to be implemented in temporal.rs or separate EMD module)

EnhancedPeriodogramFeatures

Enhanced periodogram analysis features

FrequencyFeatures

Comprehensive frequency domain features for time series analysis

SpectralAnalysisFeatures

Comprehensive spectral analysis features

WaveletFeatures

Placeholder wavelet features (to be implemented in wavelet.rs)

WindowTypeInfo

Window type information for spectral analysis

Functions

calculate_bartlett_periodogram

Calculate Bartlett’s periodogram using averaged periodograms

calculate_bias_corrected_periodogram

Calculate bias-corrected periodogram

calculate_blackman_tukey_periodogram

Calculate Blackman-Tukey periodogram

calculate_dynamic_range

Calculate dynamic range of periodogram

calculate_enhanced_ar_periodogram

Calculate enhanced autoregressive periodogram

calculate_enhanced_periodogram_features

Calculate enhanced periodogram analysis features

calculate_enhanced_welch_periodogram

Calculate enhanced Welch’s periodogram with advanced windowing

calculate_frequency_bands

Calculate frequency bands

calculate_frequency_features

Calculate comprehensive frequency domain features

calculate_interpolated_periodogram

Calculate interpolated periodogram

calculate_interpolation_effectiveness

Calculate interpolation effectiveness

calculate_multitaper_periodogram

Calculate multitaper periodogram using Thomson’s method (simplified)

calculate_peak_significance

Calculate peak significance for periodogram

calculate_periodogram_confidence_intervals

Calculate confidence intervals for periodogram

calculate_simple_periodogram

Calculate simple periodogram using FFT

calculate_smoothed_periodogram

Calculate smoothed periodogram

calculate_snr_from_periodogram

Calculate signal-to-noise ratio from periodogram

calculate_spectral_analysis_features

Calculate spectral analysis features (placeholder)

calculate_spectral_centroid

Calculate spectral centroid

calculate_spectral_entropy

Calculate spectral entropy

calculate_spectral_flatness

Calculate spectral flatness

calculate_spectral_kurtosis

Calculate spectral kurtosis

calculate_spectral_leakage

Calculate spectral leakage measures

calculate_spectral_purity

Calculate spectral purity measure

calculate_spectral_rolloff

Calculate spectral rolloff

calculate_spectral_skewness

Calculate spectral skewness

calculate_spectral_spread

Calculate spectral spread

calculate_variance_reduced_periodogram

Calculate variance-reduced periodogram

calculate_window_analysis

Calculate window analysis for enhanced periodogram

calculate_window_effectiveness

Calculate window effectiveness metrics

calculate_zero_padded_periodogram

Calculate zero-padded periodogram

calculate_zero_padding_effectiveness

Calculate zero padding effectiveness

create_window

Create a window function

find_dominant_frequency

Find dominant frequency

find_spectral_peaks

Find spectral peaks