neurodsp.aperiodic.conversions.convert_alpha_exponent¶
- neurodsp.aperiodic.conversions.convert_alpha_exponent(alpha)[source]¶
Convert a DFA alpha value to the expected powerlaw exponent.
- Parameters
- alphafloat
Alpha value from a detrended fluctuation analysis.
- Returns
- exponentfloat
Predicted aperiodic exponent value, representing a 1/f distribution.
References
- 1
Schaefer, A., Brach, J. S., Perera, S., & Sejdić, E. (2014). A comparative analysis of spectral exponent estimation techniques for 1/fβ processes with applications to the analysis of stride interval time series. Journal of Neuroscience Methods, 222, 118–130. https://doi.org/10.1016/j.jneumeth.2013.10.017
Examples
Convert a DFA alpha value to the expected powerlaw exponent:
>>> convert_alpha_exponent(1) -1.0