Assign vectors from MATLAB workspace structure to Simulink Model inports

I need help with running a Simulink model with the data from MATLAB workspace contained in structures. Below is a very simplified use-case of what I would like to do

Use Case :

I have a struture in MATLAB workspace called "data", and it has two fields x, and y which are vectors. I have a simulink model with two inports named x and y. I would like to dynamically assign to data from the structure "data" to the Simulink inports and run the model

The above use case is a very simplified scenario. The model that I intend to use can have 100 inports, and thus I do not want to use "From Workspace" block, as it would be impractical for me to add 100s of them

How can I handle such a situation in Simulink. I am a little more than a beginner in MATLAB and Simulink. So, a detailed answer would help me a lot

Answer 1

[TAB]

See Load Data to Root-Level Input Ports

You need to arrange your data in time series form.

One of the format is like below:

dataIn.time = [0:10]'; % Depend upon your sample time and stop time

dataIn.signals(1).values = data.x; % x values at each step
dataIn.signals(1).label = 'x'; %Inport name

dataIn.signals(2).values = 'data.y'; % y values at each step
dataIn.signals(2).label = 'y'; %Inport name

Now enter dataIn in Configuration Parameters > Data Import/Export > Load from workspace > Input

[Masoom Kumar]

Hello Tabrez

I tried the method that you have suggested and got an error. The details are mentioned below

So, this is what I did

a. Used the script written below to make a dataIn time-series

dataIn.time = [0:10]'; % Depend upon your sample time and stop time data.x = [0:1:10]'; data.y = [0:1:10]'; dataIn.signals(1).values = data.x; % x values at each step dataIn.signals(1).label = 'x'; %Inport name dataIn.signals(2).values = 'data.y'; % y values at each step dataIn.signals(2).label = 'y'; %Inport name

b. Make the changes to Data Import/Export as mentioned (dataIn.png)

c. Executed the simple simulink model (see model.png)

d. Run the model, and I get an error shown below (error.png)

[TAB]

dataIn.signals(2).values = 'data.y';

--> You have assigned string here. Remove the single quote.

[Masoom Kumar]

Thank you very much for the help. It solved the problem

Just to add, on the page that you had suggested, I found another method using Loading Data Arrays to Root-Level Inputs, which was also very useful. Just bunch all the signals in a matrix :)