Scanning signal/Storing anything other then zeros

Hi

I have a filtered signal where the base line is zero that looks in principle like this:

[0 0 0 -1 2 -2 0 0 0 2 1 -1 0 0 0 2 3 1 0 0 0...]

I wish to scan the signal and store the structures within it in a matrix such as this one:

[-1 2 -2; 2 1 -1; 2 3 1;...]

Which is the most efficient way to do this? Can I use the find function efficiently for this?

[Rik]

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Answer 1

[Mathieu NOE]

hello

my suggestion / demo code :

I understand the output must be a matrix of 3 columns;

tol = eps; % set a tolerance value (very low but not zero)
a = [0 0 0 -1 2 -2 0 0 0 2 1 -1 0 0 0 2 3 1 0 0 0];  % input data
b = a(abs(a)>tol);  % remove zero (below tol) data
c = (reshape(b,[],3))'; % reshape in 3 columns matrix and transpose

c =

    -1     2    -2
     2     1    -1
     2     3     1