MATLAB: App designer – error using plot

app designer

Hi there. I'm having some trouble getting up and running with app designer. I've tried following several of the examples / demos in the documentation and also some videos on youtube. I get the same error every single time I try to run something: "Error using plot. Too many input arguments." Here's some code for a simple app that takes a numeric input to plot a curve:
classdef plotSin < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure              matlab.ui.Figure                   % UI Figure
        UIAxes                matlab.ui.control.UIAxes          
        Label                 matlab.ui.control.Label            % Type a v...
        LabelNumericEditField matlab.ui.control.Label            % a
        NumericEditField      matlab.ui.control.NumericEditField % [-Inf Inf]
    end
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)
        end
        % NumericEditField value changed function
        function NumericEditFieldValueChanged(app)
            a = app.NumericEditField.Value;
            x = 0:0.1:pi;
            y = sin(a*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 = [100 100 867 624];
            app.UIFigure.Name = 'UI Figure';
            setAutoResize(app, app.UIFigure, true)
            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            xlabel(app.UIAxes, 'X');
            ylabel(app.UIAxes, 'sin (ax)');
            app.UIAxes.Position = [175 107 509 327];
            % Create Label
            app.Label = uilabel(app.UIFigure);
            app.Label.FontSize = 18;
            app.Label.Position = [362 561 149 23];
            app.Label.Text = 'Type a value for a:';
            % Create LabelNumericEditField
            app.LabelNumericEditField = uilabel(app.UIFigure);
            app.LabelNumericEditField.HorizontalAlignment = 'right';
            app.LabelNumericEditField.FontSize = 18;
            app.LabelNumericEditField.Position = [362 512 20 23];
            app.LabelNumericEditField.Text = 'a';
            % Create NumericEditField
            app.NumericEditField = uieditfield(app.UIFigure, 'numeric');
            app.NumericEditField.ValueChangedFcn = createCallbackFcn(app, @NumericEditFieldValueChanged);
            app.NumericEditField.FontSize = 18;
            app.NumericEditField.Position = [397 514 100 24];
        end
    end
    methods (Access = public)
        % Construct app
        function app = plotSin()
            % 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

Best Answer

You have a plot.m function that is shadowing the built-in plot function. Type the following command to locate your plot.m and rename or remove it.
which -all plot
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