Get value from function to be used in another program part 2

Hello,

I have this function

function [x y] = centroid(X)

X = X/sum(X(:));
[m,n]=size(X);
[I,J]=ndgrid(1:m,1:n);

centro = [dot(I(:),X(:)),  dot(J(:),X(:))];

end

when I try to use this function call in another program to use the centro values, I get an error , "Output argument "x" (and maybe others) not assigned during call to "centroid"."

How can I use the data out from this function?

Here is my use case in another program:

A = centroid(X);
A(1,:)

Thanks.

Answer 1

[Walter Roberson]

MATLAB is case sensitive. You assign to X but your output argument is x (lower-case)

[monkey_matlab]

Hello Walter, THANKS for your input! If just type

centroid(X)

In my other program, I get the x,y values to show up in the command window. However, if I try to use the commands like that given above in another program:

A = centroid(X);
A(1,:)

I get the error and cannot access the x,y values.

[Walter Roberson]

You never assign to x or y . You assign to X (a different variable), and to I, J, m, n and centro . Any variable that appears on the left side if the "=" of your "function" line must usually be assigned to.

Answer 2

[Mauricio Bassallo]

Hi,

I have a model created in Simulink (also with Simscape elements) and I want that some some outputs (ports) of the model be sent to another program, which is going to return inputs to the model (control the model) based on the outputs that was sent by the model.

Does anyone have some idea about how to create an interface between Simulink model and a program in order to generate such dynamic?

Thnaks in advance for your reply!

Mauricio