How to Plot 2D graph in GUI?

I have function f(X)=e.^-x sin(2*x) i can't draw the function by pressing the button can you help

 % Button pushed function: Plot2DButton
        function Plot2DButtonPushed(app, event)
           Upper X = str2double(app.UpperXEditField.Value);
           Lower X = str2double(app.LowerXEditField.Value);
            x = linspace(LowerX, UpperX, 500);
            y = x.^2; % Example function - change it according to your needs
            plot(app.UIAxes2D, x, y);
        end
    end

[Walter Roberson]

 % Button pushed function: Plot2DButton
        function Plot2DButtonPushed(app, event)
            UpperX = str2double(app.UpperXEditField.Value);
            LowerX = str2double(app.LowerXEditField.Value);
            x = linspace(LowerX, UpperX, 500);
            y = x.^2; % Example function - change it according to your needs
            plot(app.UIAxes2D, x, y);
        end
    end