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Showing 1 to 2 of 2 for “"Walsh-Fourier"”.
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Adaptive Fourier Analysis For Unequally-Spaced Time Series Data
Fourier analysis, Walsh-Fourier analysis, and wavelet analysis have often been used in time series analysis. Fourier analysis can be used to detect periodic components that have sinusoidal shape; however, it might be misleading when the periodic components are not sinusoidal. Walsh-Fourier analysis …
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A new representation for binary or categorical-valued time series data in the frequency domain
The classical Fourier analysis of time series data can be used to detect periodic trends that are of sinusoidal shape. However, this analysis can be misleading when time series trends are not sinusoidal. When the time series process of interest is binary or categorical-valued data, it might be more …