Calling a function in App Designer

I have a function (let's call it 'results.m') and I would like to call it in an app I am creating. I want the inputs to be: filename, characteristic, and environment. These three inputs are set by 3 different Edit fields (text) in the app, and then after pressing the run button I would like to call the function with these three inputs, receive x and y data to plot, and then plot it. I am unsure of how to call the function and how to declare these three inputs as properties, and advice or tips?

Answer 1

[Cris LaPierre]

Rather than having an external function, I would incorporate the function into your app. You can either incorporate it into the callback function for your Run button, or have it be a separate function in your app that is called by your run button callback. See here for creating a function in an app:

• Reuse Code Using Helper Functions

As for creating app properties, see here:

• Share Data within App Designer Apps

I would create X and Y as app properties, and rather than have your function return them, just update their values inside your function.

You can also call an external function, as Walter shows. You just need to make sure the function file is in the same folder as your *.mlapp file, or in a folder that has been added to your MATLAB path.

Answer 2

[Walter Roberson]

filename = app.EditField1.Value;
characteristic = app.Editfield2.Value;
environment = app.Editfeild3.Value;
[x, y] = results(filename, characteristic, environment);
plot(app.UIAxes1, x, y);
title(app.UIAxes1, 'My plot');

There is no need to "declare" the inputs.

If you want, you have the option to declare the inputs inside of results.m in a arguments block.