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Re: what is the purpose of "simmx.m" M-file in dynamic time warping, in matlab?
Rob guided me in this regard. i am really thankful to him.
here is the explanation by "Rob".
simmx generates a similarity matrix.
Here's a working implementation:
Dynamic Time Warp in Matlab
The example puts features, as a spectrogram into D1 and into D2 (complex).
The absolute value of D1 and D2 is calculated using abs() which returns a 1xN matrix/vector. These are turned into feature vectors by the lines:
EA = sqrt(sum(A.^2));
EB = sqrt(sum(B.^2));
Where sum(A.^2) produces a sum of the squares of the columns in spectrogram D1, the square root is then taken by sqrt(). This becomes element 1 of EA and so on.
So now the two feature vectors might look something like:
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