I have this following command:
n=100; ri=1:1:n
I would like to create a new vector according to this pattern: X=[(ri(3)-2*ri(2)+ri(1)),ri(4)-2*ri(3)+ri(2),…,ri(n)-2*ri(n-1)+ri(n-2)].
In words, I would like to create a vector in which its first element is composed by the the third element of ri minus 2*second element of ri plus the first element of ri. The second element would be ri(4)-2*ri(3)+2*ri(2). This pattern would be repeated until ri(n)-2*ri(n-1)+ri(n-2).
Can I create this vector with this specific pattern in Matlab? Sorry If I was not clear in my question.
Thank you very much!
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