DSO_Window
From stream v1.23
by Michael Hahsler
Sliding Window (Data Stream Operator)
Implements a sliding window data stream operator which keeps a fixed amount (window length) of the most recent data points of the stream.
Usage
DSO_Window(horizon = 100, lambda=0)
Arguments
 horizon
 the window length.
 lambda
 decay factor damped window model.
lambda=0
means no dampening.
Details
If lambda
is greater than 0 then the weight
uses a damped window model (Zhu and Shasha, 2002).
The weight for points in
the window follows $2^{lambda*t}$ where $t$ is the age of the point.
Value

An object of class
DSO_Window
(subclass of
DSO
.
References
Zhu, Y. and Shasha, D. (2002). StatStream: Statistical Monitoring of Thousands of Data Streams in Real Time, Intl. Conference of Very Large Data Bases (VLDB'02).
See Also
Examples
stream < DSD_Gaussians(k=3, d=2, noise=0.05)
window < DSO_Window(horizon=100)
window
update(window, stream, 200)
window
# plot points in window
plot(get_points(window))
Community examples
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