MATLAB: How to split signal in simulink

MATLABsimulink

Hello, I have this easy model. In matlab function block I have command ulength=length(u); and it returns me 1. It should give me 30, because in red box is set time to 30. My question is if I can split somehow the signal, because I need to use in matlab function block for loop: For example:

for k=1:30
    z= [-y(k-1) u(k-1)]';
end

But it shows me error: that signal 'u' and 'y' are one dimensional with one element. So is there way how to split that signal so I could work with it like in matlab workspace?

Best Answer

I'm not sure if this is the answer to your question, but Here is how to access a signal from the previous calculation iteration, y(n-1), in Simulink:

Related Solutions

MATLAB: Store “From Workspace” Variable into array in Simulink

Use matlab function block with this code

function y = fcn(u)
%#codegen
persistent k z
n=10
if isempty(k)
  k=0
  z=zeros(1,n);
end
z=[z(2:n) u]
y=z

MATLAB: Error: Subscript indices must either be real positive integers or logicals. Please help me. My code

Hint: Never define a variable named exp. If you do, you will get that error.

Try this:

which exp -all

If that is not the problem, then look carefully at your code. Is there ANY place where you have a variable with NO operator between the variable and an open parens? Consider this line from your code:

n)*n*z)+l*n*(-m^2*z+lamda*n^2*(n+m(-3+n*z))))))/((exp(l*m).*m^2-exp(l*n).*lamda.*n^3.*

What might you have intended by the fragment m(-3+n*z)?

Is m a function? Is m a variable to be indexed by the expression -3+n*z? Or did you really intend there to be an operator between the m and the ( ?

When you get an error like this, look carefully at your code. If I could find it easily enough, surely you could have found it in much less time than it took me to answer this question.

There may be other errors. Check your code.

Best Answer

Related Solutions

MATLAB: Store “From Workspace” Variable into array in Simulink

MATLAB: Error: Subscript indices must either be real positive integers or logicals. Please help me. My code

Related Question