visualize the sax

[dlrts]

Hi there,

has anyone done or is there available a tool/ some code / whatever to visualize the sax transformation.

What I have in my mind is to have the original timeseries plottet and than an overlay of the discretized "steps" of the transformation as well as the assigned symbol. It sure also needs handly the moving window - maybe with a slider? That way I could see if the main shaped are still represented.
Why I would need this? - well we have a very hard time to figure out good parameters for our various serieses. The all have different shapes and frequencies that would require different parameters. However I am dealing with a compuational intensive process which makes it very inconvinient to "guess" parameters (I am doing some classification on saxified data).

any suggestions greatly appreciated,
Daniel

[Pavel Senin]

Hi Daniel:

Unfortunately, I do not have any code which can visualize the SAX decomposition, but I agree that it would be nice to have that.

From other hands, I think, what would be particularly challenging is that to show and to comprehend z-Normalization of overlapping windows.

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Mahalo, Pavel.

[dlrts]

yes this is a challenge.
i thought of only displaying one window at a time, maybe highlight it in the original series. and then have a slider to move through all the windows. does that sound reasonable?

[Jessica Lin]

Hi Daniel,

  You can find the original (very old) SAX code in Matlab that visualizes SAX discretization here: http://www.cs.gmu.edu/~jessica/sax.htm

Jessica