How to extract lengths of sequences from a binary vector?

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Mr M.
Mr M. on 27 Feb 2018
Edited: Stephen23 on 27 Feb 2018
For example, I have x = [0 0 1 1 1 0 1 0 0 0 0 1 1 0]; and I need 2,3,1,1,4,2,1. Are there any simple way to get this?

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Answers (2)

Matt J
Matt J on 27 Feb 2018
Edited: Matt J on 27 Feb 2018
If you have the Image Processing Toolbox
S=regionprops(boolean(x),'Area')
sequenceLengths=[S.Area],
Stephen23
Stephen23 on 27 Feb 2018
Edited: Stephen23 on 27 Feb 2018
>> x = [0 0 1 1 1 0 1 0 0 0 0 1 1 0];
>> idx = find([1,diff(x),1]);
>> idx(2:end)-idx(1:end-1)
ans =
2 3 1 1 4 2 1

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