Biology Reference
In-Depth Information
200
180
160
140
120
100
80
60
40
20
0
0
24
48
72
96
120
144
168
192
216
240
264
288
312
336
200
180
160
140
120
100
80
60
40
20
0
0
24
48
72
96
120
144
168
192
216
240
264
288
312
336
200
180
160
140
120
100
80
60
40
20
0
0
24
48
72
96
120
144
168
192
216
240
264
288
312
336
Time (hours)
FIGURE 11-9.
Plots of the data from WT.NO (top panel), TAUSS.NO (middle panel), and TRNSPLNT.NO (bottom panel).
III. FUNDAMENTALS OF RHYTHMIC DATA
AND TIME SERIES
A. Elementary Background
Recall that a purely periodic waveform might be of the form:
f
ð
t
Þ¼a
cos
ðb
t
þ gÞ:
Each of the parameters
a
,
b
, and
g
serves a particular function. The
parameter
a
controls the amplitude of the wave. Figure 11-10(A) shows
the graph of
controls the period
(and therefore the frequency, because the frequency is the inverse of the
a
cos(t) where
a >
0. The parameter
b
