I need to create one vector from performing subtraction within another.

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Darreon Schwartz
Darreon Schwartz 2016-9-18
评论： Darreon Schwartz 2016-9-18
I need to take a vector X1 X2 X3 X4 X5 and create a new vector, 1 unit shorter: (X1-X2) (X2-X3) (X3-X4) (X4-X5) and so on. I'm very new to matlab and any help would be appreciated.

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Stephen23
Stephen23 2016-9-18
编辑：Stephen23 2016-9-18
Just negate the output of diff:
-diff(your_vector)
eg
>> vec = [1,8,3,7,2];
>> -diff(vec)
ans =
-7 5 -4 5

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