How can I save a figure within app designer?

2 min readNov 18, 2023

I’ve developed an application using the new App Designer. I’d like to have users be able to click a button and save a figure to a .fig file, or some other image format.

function ButtonSaveFigureButtonPushed(app)
            newfigure = figure;
            copyobj(app.UIAxesAP, newfigure);
            hgsave(newfigure, 'testFIgure.fig');
end

But that gave me the error…

Error using matlab.ui.control.UIAxes/copyElement (line 1219)
Functionality not supported with UIAxes. For more information, see Graphics Support in App Designer.,/pre>

What’s the best way to go about this?

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I spent some time on this for my own purposes. The trick is to save the individual values from the figure into local variables to be used in a figure as follows:

h = figure;
            h.Visible = 'off';
            x = UIAxes.XAxis.Parent.Children.XData;
            y = UIAxes.XAxis.Parent.Children.YData;
            plot(x,y)
            lgndName1 = UIAxes.Legend.String{1};
            lgd = legend(lgndName1);
            lgd.Box = UIAxes.Legend.Box;
            lgd.Location = UIAxes.Legend.Location;
            h.CurrentAxes.YLabel.String = UIAxes.YLabel.String;
            h.CurrentAxes.YLabel.FontSize = UIAxes.YLabel.FontSize;
            h.CurrentAxes.XLabel.String = UIAxes.XLabel.String;
            h.CurrentAxes.XLabel.FontSize = UIAxes.XLabel.FontSize;
            h.CurrentAxes.Title.String = UIAxes.Title.String;
            h.CurrentAxes.Title.FontSize = UIAxes.Title.FontSize;
            h.CurrentAxes.XLim = [0 max(x)];
            h.CurrentAxes.XLim = [0 max(y)+1];
            saveas(h,SaveName,'jpg')
            savefig(h,SaveName)
            delete(h)

Notice I have the visibility off, because I don’t want the user to see this going in the background.

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