Asked by hasan
on 16 May 2012

Hi,

How can i pass a structure that is defined in matlab workspace to simulink embedded matlab function block. e.g :

Numbers.a＝1;

Numbers.b＝2;

These are defined in matlab ws. Then by using the input port in simulink, can i pass this to matlab emb function block in simulink, or any other way?

Thanks four your replies...

Answer by Kaustubha Govind
on 16 May 2012

You will need to define a Simulink.Bus signal to import the structure into Simulink as a nonvirtual bus - see Importing Structures of MATLAB timeseries Objects for Bus Signals to a Root-Level Input Port. Also refer to Working with Structures and Bus Signals in the MATLAB Function block documentation.

Kaustubha Govind
on 17 May 2012

Answer by Kyle Andringa
on 28 Nov 2012

Yes, this can be done. As you mentioned, go into the EditData (Ports and Data Manager) page of the embedded Matlab file. Define a variable and choose Input as the Scope. Then on the outside of the embedded Matlab file assign the input to a Constant block. Within the Constant block, assign the structure (Numbers). On the signal attributes of the constant block, you must assign the output to a Bus signal which matches the structure (Numbers). This process is compatible with Rapid Accelerator.

Alternatively, you could choose the Scope as Parameter instead of Input. In this case you just name the Parameter "Numbers". This method is not compatible with Rapid Accelerator.

In both cases, you can only go one layer deep within the structure at a time. However, you can dig deeper in multiple steps. Example:

It doesn't like: new_var = Numbers.A.a But you could do: A = Numbers.A; a = A.a;

I'm not sure the reasoning for all of these nuances, I just know these items from (painful) experience.

Good Luck.

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi test

Learn moreOpportunities for recent engineering grads.

Apply Today
## 1 Comment

## Kaustubha Govind (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/38559#comment_112061

Kyle: I would recommend posting your answer under the Answers section instead of as a comment on the question. Thanks! :)