MATLAB: How to show the contents of a folder in app designer and plot the files in it

app designermatlab functionplotplotting

Hi All

my code generates some excel files as output in a certain folder. which are a 2 column data. I was wondering if there is any way to show the content of this folder in a box as a list that dynamically updates as the code proceeds, or even just using a button that can update this box. then by hovering over each file name and selecting it from the box, I could plot it in a UIfigure plot in the app window. is this possible ?

Best Answer

See the attached app. It will list all the .xlsx file in the current folder and if it only has two columns, then plot it on the axes.

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MATLAB: How to add multiple legends in app designer

Add a display name to each plot. then turn on the legends at the end

% example
ax = axes;
hold(ax,'on');
for i = 1:10
    plot(ax,1:10,1:10,'DisplayName',['line' num2str(i)])
end
legend(ax);

Please note that your variables names and plots will not persist after the function finish executing.

If you want to store this then please add property to your app, then you can store the values in this property.

Also the way this code is written, it does not allow multi select on the file list. if you want to do that you may have to edit this code.

function FilesListBoxValueChanged(app, event)
    switch app.HoldPlotsCheckBox.Value
       case 0
          cla(app.UIAxes)
          filename = app.FilesListBox.Value;
          data = xlsread(filename);
          plot(app.UIAxes, data(:,1), data(:,2),'DisplayName',filename);
       case 1
           hold(app.UIAxes,'on');
           filename = app.FilesListBox.Value;
           data = xlsread(filename);
           % if you want to store plot reference u need to create a app property.
           pl=plot(app.UIAxes, data(:,1), data(:,2),'DisplayName',filename);
           legend(app.UIAxes);
           hold(app.UIAxes,'off');
    end
end

MATLAB: Plotting in App designer

x = 1:10;
y = sin(x);
plot(app.UIAxes,x,y);

Best Answer

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MATLAB: How to add multiple legends in app designer

MATLAB: Plotting in App designer

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