Graphics Programs Reference
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for the data set. Adding a colorbar
colorbar
provides a quantitative measure for the distances between states (Fig. 5.14).
We apply a threshold
to the distance matrix to generate the black/white
recurrence plot (Fig. 5.15).
ε
imagesc(t,t,S<1)
colormap([1 1 1;0 0 0])
xlabel('Time'), ylabel('Time')
Both plots reveal periodically occurring patterns. The distances between
these periodic patterns represent the cycles contained in the time series. The
most signifi cant periodic structures have periods of 200 and 100 kyr. The 200
kyr period is most signifi cant because of the superposition of the 100 and 40
kyr cycles, which are common divisors of 200 kyr. Moreover, there are small
0
100
200
300
400
500
600
700
6.0
800
4.0
900
2.0
0.0
0
100
200
300
400
500
600
700
800
900
Fig. 5.14 Visualization of the distance matrix from the synthetic data providing a quantitative
measure for the distances between states at certain times; blue colors indicate small distances,
red colors represent large distances.
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