Load array from .mat file in Matlab System

I am curently coding a Matlab System for use in Simulink. I want to load two large arrays from a .mat file to be used in the Matlab System. Because of that, I figured I could load the data like this in the resetImpl function.

function resetImpl(obj)
    % ...
    obj.arrays = load('arrays.mat');
    % ...
end

However, this results in the error:

Function 'load' can only be used as the right-hand side of a simple assignment to a struct or array variable without subscripting.

How can I load a .mat file in a Matlab System?

[Walter Roberson]

load() storing into a simple variable . Extract fields from the struct and store into obj.

Note that this requires that you be using System Objects https://www.mathworks.com/help/simulink/slref/matlabsystem.html

[Jan Letmade]

Thank you @Walter Roberson! It did the trick. If anyone finds this later, this was the solution:

function resetImpl(obj)
    % ...
    arrays = load('arrays.mat');
    obj.array1 = arrays.array1;
    obj.array2 = arrays.array2;
    % ...
end

Answer 1

[Abderrahim. B]

Hi!

I believe you are building a model in Simulink! If this is the case, you don't need to write a function for loading data:

Use From File block.

Other blocks to import data to simulin can be foudn here .

hope this helps

[Walter Roberson]

From File is restricted to creating signal objects . If you needed to do something such as load a covariance matrix for matrix multiplication then From File would not be suitable .