how to calculate element distance in a vector?

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sara
sara le 21 Oct 2014
Commenté : sara le 21 Oct 2014
hi guys i want to calculate the difference between vector element as [0 1 1 0 1 1 0] which should give 0-1=1,1-1=0,1-0=1,0-1=1,1-1=0,1-0=1,,, and the sum answer should be 4. how to do this. and what if there's 12 vector within one matrix.

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W. Owen Brimijoin
W. Owen Brimijoin le 21 Oct 2014
It looks like you want the sum of the absolute value of the differential of those numbers? You get your first answer like this:
abs_diff = abs(diff([0 1 1 0 1 1 0]))
You would then sum these values. If all you want is the final answer, this is how to do it:
answer = sum(abs(diff([0 1 1 0 1 1 0])))
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W. Owen Brimijoin
W. Owen Brimijoin le 21 Oct 2014
In order to answer this you would need to explain what you are looking for: one number per row, one per column, a giant sum (and if so in what dimension)?
sara
sara le 21 Oct 2014
what i'm looking for is the number per row, answer :3 2 2 for the above matrix. and i need it to calculate to the end of the rows.

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W. Owen Brimijoin
W. Owen Brimijoin le 21 Oct 2014
Try this:
answer = sum((abs(diff(M,1,2))),2)
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sara
sara le 21 Oct 2014
yes,, it works,, thank you very much,, you save my day...

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