Tucker, J. Derek; Wu, Wei; Srivastava, Anuj - In: Computational Statistics & Data Analysis 61 (2013) C, pp. 50-66
general, functional data contains both phase (or x or horizontal) and amplitude (or y or vertical) variability. Traditional … methods often ignore the phase variability and focus solely on the amplitude variation, using cross-sectional techniques such … amplitude (y-axis), then modeling these components using joint distributions. This separation, in turn, is performed using a …