App designer - trouble with the example code

Hi everyone

I'm brand new to app designer.

I've tried creating the first three apps in the help documentation:

http://uk.mathworks.com/help/matlab/creating_guis/simple-app-designer-example-apps.html#bu8rqr6-1

I can't get any of them to work. I get the same error message in each: "Error using plot. Too many input arguments"

I notice that in the command window I get a warning: "Warning: Function plot has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict."

My code is exactly the same as in the help documentation - I haven't created a function called plot.

Baffled - can anyone help?

classdef simplePlot < matlab.apps.AppBase

      % Properties that correspond to app components
      properties (Access = public)
          UIFigure              matlab.ui.Figure                   % UI Figure
          UIAxes                matlab.ui.control.UIAxes           % Title
          LabelNumericEditField matlab.ui.control.Label            % Enter value
          NumericEditField      matlab.ui.control.NumericEditField % [-Inf Inf]
          Button                matlab.ui.control.Button           % Plot
      end

      methods (Access = private)

          % Code that executes after component creation
          function startupFcn(app)

          end

          % Button button pushed function
          function ButtonButtonPushed(app)
              x = 0:pi/100:2*app.NumericEditField.Value;
              y = sin(2*x);
              plot(app.UIAxes,x,y)
          end
      end

      % App initialization and construction
      methods (Access = private)

          % Create UIFigure and components
          function createComponents(app)

              % Create UIFigure
              app.UIFigure = uifigure;
              app.UIFigure.Position = [100 100 899 697];
              app.UIFigure.Name = 'UI Figure';
              setAutoResize(app, app.UIFigure, true)

              % Create UIAxes
              app.UIAxes = uiaxes(app.UIFigure);
              title(app.UIAxes, 'Title');
              xlabel(app.UIAxes, 'X');
              ylabel(app.UIAxes, 'Y');
              app.UIAxes.Position = [38 132 462 499];

              % Create LabelNumericEditField
              app.LabelNumericEditField = uilabel(app.UIFigure);
              app.LabelNumericEditField.HorizontalAlignment = 'right';
              app.LabelNumericEditField.Position = [613 470 60 15];
              app.LabelNumericEditField.Text = 'Enter value';

              % Create NumericEditField
              app.NumericEditField = uieditfield(app.UIFigure, 'numeric');
              app.NumericEditField.Position = [688 466 100 22];

              % Create Button
              app.Button = uibutton(app.UIFigure, 'push');
              app.Button.ButtonPushedFcn = createCallbackFcn(app, @ButtonButtonPushed);
              app.Button.Position = [688 359 100 22];
              app.Button.Text = 'Plot';
          end
      end

      methods (Access = public)

          % Construct app
          function app = simplePlot()

              % Create and configure components
              createComponents(app)

              % Register the app with App Designer
              registerApp(app, app.UIFigure)

              % Execute the startup function
              runStartupFcn(app, @startupFcn)

              if nargout == 0
                  clear app
              end
          end

          % Code that executes before app deletion
          function delete(app)

              % Delete UIFigure when app is deleted
              delete(app.UIFigure)
          end
      end
  end

Thanks in advance.

[Chris Portal]

Try the following and see if it returns any PLOT functions that look suspect:

which plot -all

[Pete]

There was a plot function hiding in amongst all my messy test files - very careless. Thanks for your help.