Define Integral in Matlab

Hello,

If I want to write the code of this simulink model in matlab how can I do it?

x, y and z are vectors of length=6000 for each one of them.

I want to calculate the value of z at each time, I used:

for k=1:6000

func = sum(x(1:k)) - sum(y(1:k)); %x and y are discrete variables

z(k)= Constant*func*Te; %Te represents the sample time

end

Answer 1

[Fabio Freschi]

Suppose to have these data

The simulink model is calulating

you can calulate the integral in the discrete form with cumtrapz

% data
t = linspace(0,1,20).';
x = 2*t;
y = t.^2;
c = 3;

% function to integrate
dz = c*(x-y);

% function z
z = cumtrapz(t,dz);

% plot
figure,hold on
plot(t,z,'LineWidth',2)
% check
plot(t,3*t.^2-t.^3,'--','LineWidth',2)