add up a signal for every timestep

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st
st 2013-3-16
hello i've got an embedded matlab function in my model, which creates an output signal(wastage of fuel). Now i want to add up this signal for every timestep, so that i obtaine the total wastage after the simulation. Is there a way? Hope that was understandable ;)
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Azzi Abdelmalek
Azzi Abdelmalek 2013-3-16
You want to add the signal to what?
st
st 2013-3-16
I mean i want to sum the wastage after every timestep so that i get the total wastage after the simulation.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-3-16
编辑：Azzi Abdelmalek 2013-3-16
Ok, you want a cumulative sum:
In your embedded function add these codes
at the beginning
function [☺utput,cum_output]=fcn(....)
persistent cum_output
if isempty(cum_output)
cum_output=0
end
and at the end of your code
cum_output=cum_output+output
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Azzi Abdelmalek
Azzi Abdelmalek 2013-3-17
st, I can't answer this question, because you did not provide enough information. What is sure is the code I added allows you to do cumulative sum.
st
st 2013-3-25
ok, understand that, even so thank you for your help.

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