row vector summation in pairs without looping

Hi, I'm a beginner in matlab,I need to compute the sum of all consecutive pairs in my row vector and sum of all those sums computed without looping over.

Ex : [1 2 3 4 5] will give (1+2)+(2+3)+(3+4)+(4+5)

Hope you can help me out. Thanks in advance!

Answer 1

[Satwik Samayamantry]

Considering you are giving a row vector as input named inputVec, you can get the required result using the following line without for loop

result = 2*sum(inputVec)-inputVec(1)-inputVec(length(inputVec))

Answer 2

[Cris LaPierre]

Seems like you could create 2 vectors from the given vector, one containing the first number in each summation, and the other containing the second number, and then just add the 2 vectors together.