MATLAB: How to i reset/clear an figure in app designer

app designerfigureMATLAB

I tried to write

app.UIAxes.cla;

cla(app.UIAxes)

but it doesn't do the job.

Yes it clears the figure, but when I replot something, in the same figure, the old data is still there.

How can I remove this previous data/plots?

Best Answer

Found the solution.

cla(app.UIAxes)

worked for me.

Befor I got an error: "Reference to a cleared variable app". This was because of a

clear all

. Without it, everything is fine.

Related Solutions

MATLAB: Plotting in App designer

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

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

Best Answer

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MATLAB: Plotting in App designer

MATLAB: How to add multiple legends in app designer

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