App Designer-Unrecognized variables

Hello all,

I am using app designer to build a simulaiton app. I have created a button which is supposed to run a script which then simulates a simulink model and plots some graphs.

In the app, the user assigns variables to the workspace via edit fields. However, even though the required variables for the script to run are assigned in the base workspace, I get an error of unrecognized variables.

What could be the issue here?

Thank you in advance.

Here's the code for the function:

% Button pushed function: RUNButton

function RunSimu(app, event)

% Get all variable names in the base workspace

vars = evalin('base', 'who');

% Loop through each variable and assign it in the function's workspace

for i = 1:length(vars)

varName = vars{i};

varValue = evalin('base', varName);

% Assign the variable to the function workspace

assignin('caller', varName, varValue);

end

run('APPCODE_FULLSIMULATION');

end

[Sameer]

Hi @PanPan

Using assignin('caller', ...) does not assign variables to the local function workspace. Instead, it assigns them to the workspace of the function that called your current function. In this case, it might not be doing what you expect. You might want to use assignin('base', ...) if you need to ensure they are in the base workspace.

[PanPan]

Hello @Sameer,

I tried what you proposed and I still get the same error. As it seems, I am a bit confused with the local workspaces. Any suggestion on how to procced and make it work ?

Answer 1

[Bruno Luong]

Try this:

% Button pushed function: RUNButton
function RunSimu(app, event)
% Get all variable names in the base workspace
vars = evalin('base', 'who');
% Loop through each variable and assign it in the function's workspace
assignfun = @(varName, varValue)assignin('caller', varName, varValue);
for i = 1:length(vars)
    varName = vars{i};
    varValue = evalin('base', varName);
    % Assign the variable to the function workspace
   assignfun(varName, varValue);  
end
run('APPCODE_FULLSIMULATION');
end

Though this is a bad programmation style with assihnin and evalin. You need to learn passing variables diffrently, using function arguments.