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FindSequence

Wed, 09/24/2014 - 12:13 pm

Can FindSequence work with 2D waves? I have a big positions library and a smaller one, with different coordinates and I am trying to overlap the two. FindSequence seems like a good function for this, but does not work and can't figure out why.

Igor

FindSequence looks at any wave as a 1D wave. If your input is a 2D wave it is equivalent to a 1D wave where the original columns were concatenated. As such, you would not be able to find a "sequence" if it appears in sequential rows of the original 2D wave (in that case I'd first transpose the input).

Depending on your application, finding a match in 2D may be more efficient by computing the correlation (via FFT). Example of this approach is given in the Image Processing Tutorial (File Menu->Example Experiments->Tutorials).

A.G.
WaveMetrics, Inc.

September 24, 2014 at 12:29 pm - Permalink