element to element sum

hi

i have X = [1 5 7 6 9 2 3 1 4 8 6 5]; and i want to do [1+5 5+7 7+6 6+9 ...] how can i do that?

thanks

Answer 1

[Matt J]

X(1:end-1)+X(2:end)

[milad farshbaf]

thanks for your answer

Answer 2

[Matt J]

conv(X,[1,1],'valid')