How do you use App designer to read files from a folder, list the name of the variable stored, select them and save in CSV

I need an app that is able to look inside a .mat file, list the variable stored in there, select the ones that needs to be and save them in a directory tht needs to be selected too. It is a workplace were not everybody are able to use matlab. I was thinking at an easy way to do that.

Answer 1

[Shreeya]

Hello

To load mat files and perform operations on them using the app designer, you can use, for example, the button component and define a callback function for a click event. Load the mat file as an app property as follows:

% Button pushed function: Button
function ButtonPushed(app, event)
app.file = load('file.mat');
end

Further, you can implement the other required functionalities in the callback functions of same/other components which can access the file contents using the app.file property. Refer to the following link to learn more:

https://www.mathworks.com/matlabcentral/answers/1625310-read-a-file-into-app-designer-with-a-button-and-use-later-with-another-button

[Fabio]

It does not work, below the error. But more than this, the button is to load a file I know the name. What I am looking for is something really different. After clicking the button (or whatever is good for the following) a sort of menu needs to be opened, showing directories and files so I can change directory and choose the file I need to.

Error using app1/LoadmatfileButtonPushed

Unrecognized property 'file' for class 'app1'

        % Button pushed function: LoadmatfileButton
        function LoadmatfileButtonPushed(app, event)
            app.file = load('240220_115913.mat');
        end