Biology Reference
In-Depth Information
FIGURE 11-32.
FFT-NLLS analysis of the noisy nonstationary data series originally presented in Figure 11-15, in which
detrending by DTRNDANL was performed prior to rhythms analysis.
Using the RAE as a criterion for significance, a period of 24.5 hours
is identified for the wild-type hamster with RAE
0.021. The
12.25-hour ''half-period'' is caused by an attempt at shape
accommodation of the low-activity ''flat-spots'' in the data series.
The third component has a RAE of 0.458, much greater than 0.021,
and we can thus safely conclude that the rhythm with 24.5-hour
ΒΌ
