How to use the same .mat files in different activities AppDesigner

Question

Pedro Guincho 2020-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/562766-how-to-use-the-same-mat-files-in-different-activities-appdesigner

评论： jonas 2020-7-10

Hello everyone!

I'm new to AppDesigner and I'm trying to create an app where I load a raw signal, perform pre-processing and feature extraction, save this new processed signal and then perform some statistical analysis. How can I sequently use the .mat file I need, without having to load it for every action?

Thanks!

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Answer 1

jonas 2020-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/562766-how-to-use-the-same-mat-files-in-different-activities-appdesigner#answer_464024

在 MATLAB Online 中打开

You could put the content of the .mat file in a public property. Go to code view > select properties > add a public property.

properties (Access = public)
        data = load('filename.mat')
end

You can then access the data through

app.data

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Pedro Guincho 2020-7-10

Yes, I try to do that. The problem is that I have different .mat files and I want to work with the one I choose from the search tab with the code below. How can I atribute the chosen file to the initial property?

% Button pushed function: STARTButton_2

function STARTButton_2Pushed(app, event)

if app.DAQButton_2.Value == true;

app.TabGroup.SelectedTab = app.DAQTab;

else app.LoadmatfileButton_2.Value = true;

app.TabGroup.SelectedTab = app.PrProcessingTab;

[file,path] = uigetfile('*.mat', 'Select a File');

load (fullfile(path,file))

[f,P1]=plot_FFT(100000,captured_data);

plot(app.UIAxes2, f , P1);

end

jonas 2020-7-10

I'm not sure I follow. What is the problem? Just ask the user for the file and put it in the public property. You want the user to be able to switch between files? Just replace the content of the public property.

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