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OF CARDIOVASCULAR DATA |
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OF CARDIOVASCULAR DATA |
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Plot of a time series as a function of the current and of the previous values.
Given the time series i(n), n=1,2,...N, an m-dimensional
return map is obtained by plotting the vector v(n)=[i(n),i(n-
),i(n-2),...,i(n-m*)]T
where
is an integer delay.
For example, a 3-dimension return map is obtained by plotting the time
series in a space where the x-axis is i(n), the y-axis is i(n-1),
and the z-axis is i(n-2).
If i(n) is the output of a dynamical system and the observation
time N is sufficiently long, the characteristics of the phase
space of the systems can be derived from the return map.