ABI {DFA} | R Documentation |
This function estimates the Activity balance index (ABI), which is a transformation of the self-similarity parameter (SSP), also known as scaling exponent or alpha.
ABI(x)
x |
the estimated self-similarity parameter (SSP) |
ABI = exp(-abs(SSP-1)/exp(-2))
The estimated Activity balance index (ABI) is a real number between zero and one.
Ian Meneghel Danilevicz
Danilevicz, I.M., van Hees, V.T., van der Heide, F., Jacob, L., Landré, B., Benadjaoud, M.A., Sabia, S. (2023). Measures of fragmentation of rest activity patterns: mathematical properties and interpretability based on accelerometer real life data. Research square. 10.21203/rs.3.rs-3543711/v1.
# Estimate Activity balance index of a very known time series available on R base: the sunspot.year.
library(DFA)
alpha = SSP(sunspot.year, scale = 1.2)
abi = ABI(alpha)