i want to obtain a vector that each element is subtract from the previous one

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if i have values q={3 6 8 10 12 15 16} and i want to obtain a vector that gives me: k={3 3 2 2 2 3 1}
K(ii)=q(ii)-q(ii-1)
how can i do that

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Fangjun Jiang
Fangjun Jiang on 30 Apr 2021
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