sum contents of array in groups of 10

My code produces a variable 'grains' which is a 1x3001 double.

I want to sum together the numbers in the first 10 cells, and repeat this in blocks of 10 cells until the end and save these in a new variable.

Please could somebody provide me with a starting point?

[Stephen23]

3001 is not exactly divisible by 10: what do you want done with the last element?

[C.G.]

i dont want to include the last one

Answer 1

[Stephen23]

Where V is your 1x3001 vector:

M = sum(reshape(V(1:3000),10,[]),1)

[C.G.]

thank you