How to delete certain data corresponding of other value?

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?

[KSSV]

a = a(end-2:end)

Answer 1

[KSSV]

n = length(b) ; 
a = a(end-(n-1):end)

[hj lee]

Thank you!