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Define Integral in Matlab

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Rim Abdallah
Rim Abdallah 2022-12-14
编辑： Fabio Freschi 2022-12-15
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

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回答（1 个）

Fabio Freschi
Fabio Freschi 2022-12-15
编辑：Fabio Freschi 2022-12-15
Ran in:
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)

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