To estimate the slope of the relationship between wavelet scale and wavelet energy, choices have to be made as to how these quantities are computed. Examples of these choices are the functions listed here.
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a vector of values, representing the integrals or detail coefficients in a particular artificial level
the index of the artificial level.
A numeric value corresponding to the average squared detail coefficient, squared mean absolute deviation, median scale etc.
Knight, M. I, Nason, G. P. and Nunes, M. A. (2017) A wavelet lifting approach to long-memory estimation. Stat. Comput. 27 (6), 1453–1471. DOI 10.1007/s11222-016-9698-2.
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