How can i hold on output to run a matlab function with it during simulation ?

I have an output of a model in simulation a voltage(rectangular) and i need it as in input in a matlab function with in the simulation model to run , how do i store it ? i tried a buffer an zero holder but i cant store or hold on all the values

[David K.]

Do you want to use the output once the simulation is done or during the simulation? If it is during, how many of the values do you need for the function at once?

[K G]

during the simulation , i need the values of 7 seconds of the 10 seconds simulation time

[K G]

want to store my values while simulation running under a condition to use it before the simulation time end. I only need values in my vector and no 'nan' because i need to do a calculation on it.

function u_out = fcn(statusFlag,u_in)

u_out=zeros(100000,1);

persistent n

if isempty(n)

n = 0;

end

n=n+1;

persistent u_data

if isempty(u_data)

u_data = 0;

end

if statusFlag == 4

u_data=u_in;

u_out(n+1)=u_data;

elseif statusFlag~=4 && statusFlag~=5

u_data=nan;

end

end

Answer 1

[Samatha Aleti]

Hi,

According to my understanding you want to store the output of each step simulation and want to access it in MATLAB Function block during the simulation. One of the ways you can do is to connect the Output with a delay block as one of the inputs to MATLAB function block and use persistent vector in MATLAB function to store each output.

If the MATLAB function has to perform functions based on simulation time, you can use clock block in SIMULINK model.

You can refer the attached model and MATLAB function as an example.

function y = fcn(~, data)
persistent CP
if(isempty(CP))
    CP = 0;
else
    CP = [CP data];
end
y = CP(end);