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How to delete certain data corresponding of other value?

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hj lee
hj lee 2020-6-11
评论： hj lee 2020-6-12
Hello,
Here is the example data.
a = [1 2 3 4 5 6 7 8 9 10];
b = [2.5 3.5 4.5];
c = a.*b;
the mablab can't calculate this since the number of data aren't same... so I want to delete
some data a, and I want to make a = [8 9 10]
but, the problem is a and b are depend on what I put the first initial conditions,
so it can be
a = [2 3 4 5 6 7 8 9 10 11];
b = [3.5 4.5];
in this situation, I want to make a = [10 11] (delete the data from the first value)
how to make matlab code which correspond the data automatically?

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采纳的回答

KSSV
KSSV 2020-6-11
n = length(b) ;
a = a(end-(n-1):end)

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