MATLAB: Add up a signal for every timestep

Question

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 😉

Answer 1

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