The repr_sax creates SAX symbols for a univariate time series.
Usage
repr_sax(x, q = 2, a = 6, eps = 0.01)
Arguments
x
the numeric vector (time series)
q
the integer of the length of the "piece" in PAA
a
the integer of the alphabet size
eps
is the minimum threshold for variance in x and should be a numeric value. If x has a smaller variance than eps, it will represented as a word using the middle alphabet.
Value
the character vector of SAX representation
References
Lin J, Keogh E, Lonardi S, Chiu B (2003)
A symbolic representation of time series, with implications for streaming algorithms.
Proceedings of the 8th ACM SIGMOD Workshop on Research Issues in Data Mining and Knowledge Discovery - DMKD'03