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

Question

monkey_matlab 2016-10-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/308114-get-value-from-function-to-be-used-in-another-program-part-2

回答： Mauricio Bassallo 2021-5-3

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

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.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2016-10-19

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/308114-get-value-from-function-to-be-used-in-another-program-part-2#answer_239792

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

2 个评论
显示无隐藏无

monkey_matlab 2016-10-19

在 MATLAB Online 中打开

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 2016-10-19

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.

请先登录，再进行评论。

Answer 2

Mauricio Bassallo 2021-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/308114-get-value-from-function-to-be-used-in-another-program-part-2#answer_690545

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