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. 2011 May 31;6(5):e20650. doi: 10.1371/journal.pone.0020650

Figure 3. Characterization of the probability distribution of amplitudes using Gamma and Rayleigh functions.

Figure 3

(a) Probability distribution P(A) for a subject considered to be a low risk for BD at a scale s∼0.59 h, along with Gamma (black line) and Rayleigh (grey line) best-fit functions: based on AIC, the Gamma distribution yields a better fit. (b) Probability distribution P(A) at a scale of s∼3.0 h for the same subject: the fit of the Rayleigh distribution function (gray line) is superior to the Gamma function at this scale, by AIC criteria. (c) Average value of the shape parameter, Inline graphic, at different scales (hours) for 35 subjects considered to be low risk for BD by GBI criteria (open circles) and another 35 at high risk (filled circles).