MATLAB: Sum every 24 rows in a vector

matrixsumvector

Hi I am trying to find an output which is the sum of every 24 rows of a 8760×1 vector below as hourly_deficit. Therefore I am trying to sum rows 1:24, 25:49, 50:73 etc etc
I am trying to do this on the line below
   for idx_number_panels = 1:length(number_panels) % range of PV panel units examined
    for idx_number_turbines = 1:length(number_turbines) % range of wind turbine units examined
        for idx_number_batteries = 1:length(number_batteries) % range of battery units examined
            for h=2:8759 %# hours
hourly_deficit(idx_number_panels,idx_number_turbines,idx_number_batteries, h) = hourly_annual_demand(h) - (hourly_annual_PV(h)*number_panels(idx_number_panels)) - (hourly_annual_WT(h)*number_turbines(idx_number_turbines));

Best Answer

If A is 8760-by-1, and you want to find the sum of every 24 elements, such that you will end up with 365 sums, then do:
sum(reshape(A,24,365))
As an example you can see easier, get the sum of every two elements of a 10-by-1:
A = (1:10)'
B = reshape(A,2,5)
sum(B)
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