matlab - make operation on two successive elements in a vector in matlab

Question

I have a vector A= [4 7 10] what I want to do is to sum every two elements and put the result in a new vector. So for example vector B= [11,17] which is the the sum of 4+7 and 7+10.

So if anyone could advise me how can I do this without loops.

Answer 1

In my view it is:

B = A(1:end-1) + A(2:end);

Answer 2

如果您想在将来添加 3 或 4 组等，这里有一个很容易概括的替代方法：

n = 2
conv(A, ones(1, n), 'valid')

Answer 3

你可以这样做

B = A(:,1:end-1) + A(:,2:end);

此代码不仅限于行向量。它也适用于 MxN 矩阵。