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Subtracting one row from a previous row in a single column of n long data

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Jacob Allen
Jacob Allen 2022-2-5
评论： Walter Roberson 2022-2-10
I have a single column of data that is n long and I want to be able to subtract the second row in that column by the first and have that pattern repeat. (third row subtracted by the second, fourth row subtracted by the thrid and so on).
Ex:
1
5
6
7
4
3
I would like to be able to have a code that does 5-1, 6-5, 7-6, 4-7, 4-3.
I am pretty new to MatLab so if I am using incorrect terminology or my question is confusing in any way please let me know.

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采纳的回答

Walter Roberson
Walter Roberson 2022-2-5
Ran in:
A = randi(9, 8, 2) %some data to illustrate
A = 8×2
1 4 9 2 9 7 6 3 1 9 5 7 5 8 7 8
diff(A, [], 1) %subtract row by row
ans = 7×2
8 -2 0 5 -3 -4 -5 6 4 -2 0 1 2 0

更多回答（1 个）

Cris LaPierre
Cris LaPierre 2022-2-5
Ran in:
Use the diff function
a = [1
5
6
7
4
3];
diff(a)
ans = 5×1
4 1 1 -3 -1
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