App designer - error using plot

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

Answer 1

[Steven Lord]

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

[Nikunj Patel]

Hello,

I am trying to plot by

Plot(app.UIAxes,f,Read5); in designer app but getting below error:

Undefined function 'Plot' for input arguments of type 'matlab.ui.control.UIAxes'.

My code into the designer app is as below:

classdef InrushCurrent_App1 < matlab.apps.AppBase

% Properties that correspond to app components

properties (Access = public)

UIFigure matlab.ui.Figure

InsertFilenameEditFieldLabel matlab.ui.control.Label

FileName matlab.ui.control.EditField

PumpNumberEditFieldLabel matlab.ui.control.Label

PumpNumber matlab.ui.control.NumericEditField

ValueofmeasuredFrequencyEditFieldLabel matlab.ui.control.Label

Frequency matlab.ui.control.NumericEditField

PressForSamples matlab.ui.control.StateButton

TotalmeasuredsamplesEditFieldLabel matlab.ui.control.Label

Samples matlab.ui.control.NumericEditField

TimeofmeasurementsEditFieldLabel matlab.ui.control.Label

TotalTime matlab.ui.control.NumericEditField

FFTshouldstartfromSampleLabel matlab.ui.control.Label

FFTStart matlab.ui.control.NumericEditField

MultiplicationFactorEditFieldLabel matlab.ui.control.Label

MultiFactor matlab.ui.control.NumericEditField

EliminatepowerabovethisvalueLabel matlab.ui.control.Label

EliValue matlab.ui.control.NumericEditField

FFTPlotButton matlab.ui.control.Button

UIAxes matlab.ui.control.UIAxes

end

properties (Access = private)

Read10;

end

methods (Access = private)

% Value changed function: PressForSamples

function PressForSamplesValueChanged(app, event)

Read = xlsread(app.FileName.Value,'Inrush measurements'); % read the file

ColumnNumber = app.PumpNumber.Value; % assign the column to which we are interested for

Read2 = Read(:,ColumnNumber); %value of column assigned to Read2

app.Samples.Value = numel(Read2); % counting of number of measurements into Read2

Samples2 = app.Samples.Value;

fs = app.Frequency.Value; % Frequency value is assigned to fs

app.TotalTime.Value = (Samples2)/fs; % calculation to time of measurement

app.Read10.Value = Read2;

end

% Button pushed function: FFTPlotButton

function FFTPlotButtonPushed(app, event)

Rs = app.FFTStart.Value; % From where FFT graph will start

Read2 = app.Read10.Value;

Read3 = Read2(Rs:end,1); % assign values of measurements based on the Rs into Read3

Samples3 = numel(Read3); % counting of Read3

fs = app.Frequency.Value;

f = (0:Samples3-1)*(fs/Samples3); % making of the frequency vector

Read4 = fft (Read3); % FFT made from the Read3

Read4abs = abs(Read4); % absolute value has been taken from the Read4

Ps = app.MultiFactor.Value;

Eli = app.EliValue.Value;

Read4abs(Read4abs>Eli) = 0;

Read5 = Read4abs.^Ps;

Plot(app.UIAxes,f,Read5)

end

end

% App initialization and construction

methods (Access = private)

% Create UIFigure and components

function createComponents(app)

% Create UIFigure

app.UIFigure = uifigure;

app.UIFigure.Position = [100 100 640 480];

app.UIFigure.Name = 'UI Figure';

% Create InsertFilenameEditFieldLabel

app.InsertFilenameEditFieldLabel = uilabel(app.UIFigure);

app.InsertFilenameEditFieldLabel.HorizontalAlignment = 'right';

app.InsertFilenameEditFieldLabel.Position = [15 434 91 22];

app.InsertFilenameEditFieldLabel.Text = 'Insert File name';

% Create FileName

app.FileName = uieditfield(app.UIFigure, 'text');

app.FileName.Position = [121 434 100 22];

% Create PumpNumberEditFieldLabel

app.PumpNumberEditFieldLabel = uilabel(app.UIFigure);

app.PumpNumberEditFieldLabel.HorizontalAlignment = 'right';

app.PumpNumberEditFieldLabel.Position = [23 389 83 22];

app.PumpNumberEditFieldLabel.Text = 'Pump Number';

% Create PumpNumber

app.PumpNumber = uieditfield(app.UIFigure, 'numeric');

app.PumpNumber.Limits = [0 Inf];

app.PumpNumber.ValueDisplayFormat = '%.0f';

app.PumpNumber.Position = [121 389 100 22];

% Create ValueofmeasuredFrequencyEditFieldLabel

app.ValueofmeasuredFrequencyEditFieldLabel = uilabel(app.UIFigure);

app.ValueofmeasuredFrequencyEditFieldLabel.HorizontalAlignment = 'right';

app.ValueofmeasuredFrequencyEditFieldLabel.Position = [1 344 105 28];

app.ValueofmeasuredFrequencyEditFieldLabel.Text = {'Value of measured'; 'Frequency'};

% Create Frequency

app.Frequency = uieditfield(app.UIFigure, 'numeric');

app.Frequency.Limits = [0 Inf];

app.Frequency.ValueDisplayFormat = '%.0f';

app.Frequency.Position = [121 350 100 22];

% Create PressForSamples

app.PressForSamples = uibutton(app.UIFigure, 'state');

app.PressForSamples.ValueChangedFcn = createCallbackFcn(app, @PressForSamplesValueChanged, true);

app.PressForSamples.Text = 'Press to know total samples';

app.PressForSamples.Position = [21 301 206 22];

% Create TotalmeasuredsamplesEditFieldLabel

app.TotalmeasuredsamplesEditFieldLabel = uilabel(app.UIFigure);

app.TotalmeasuredsamplesEditFieldLabel.HorizontalAlignment = 'right';

app.TotalmeasuredsamplesEditFieldLabel.Position = [3 256 136 22];

app.TotalmeasuredsamplesEditFieldLabel.Text = 'Total measured samples';

% Create Samples

app.Samples = uieditfield(app.UIFigure, 'numeric');

app.Samples.ValueDisplayFormat = '%.0f';

app.Samples.Editable = 'off';

app.Samples.Position = [157 256 72 22];

% Create TimeofmeasurementsEditFieldLabel

app.TimeofmeasurementsEditFieldLabel = uilabel(app.UIFigure);

app.TimeofmeasurementsEditFieldLabel.HorizontalAlignment = 'right';

app.TimeofmeasurementsEditFieldLabel.Position = [3 230 139 22];

app.TimeofmeasurementsEditFieldLabel.Text = 'Time of measurement (s)';

% Create TotalTime

app.TotalTime = uieditfield(app.UIFigure, 'numeric');

app.TotalTime.ValueDisplayFormat = '%.0f';

app.TotalTime.Editable = 'off';

app.TotalTime.Position = [157 230 72 22];

% Create FFTshouldstartfromSampleLabel

app.FFTshouldstartfromSampleLabel = uilabel(app.UIFigure);

app.FFTshouldstartfromSampleLabel.HorizontalAlignment = 'right';

app.FFTshouldstartfromSampleLabel.Position = [5 167 124 28];

app.FFTshouldstartfromSampleLabel.Text = {'FFT should start from '; 'Sample'};

% Create FFTStart

app.FFTStart = uieditfield(app.UIFigure, 'numeric');

app.FFTStart.ValueDisplayFormat = '%.0f';

app.FFTStart.Position = [143 173 86 22];

% Create MultiplicationFactorEditFieldLabel

app.MultiplicationFactorEditFieldLabel = uilabel(app.UIFigure);

app.MultiplicationFactorEditFieldLabel.HorizontalAlignment = 'right';

app.MultiplicationFactorEditFieldLabel.Position = [5 128 112 22];

app.MultiplicationFactorEditFieldLabel.Text = 'Multiplication Factor';

% Create MultiFactor

app.MultiFactor = uieditfield(app.UIFigure, 'numeric');

app.MultiFactor.Limits = [0 1000];

app.MultiFactor.ValueDisplayFormat = '%.0f';

app.MultiFactor.Position = [157 128 70 22];

% Create EliminatepowerabovethisvalueLabel

app.EliminatepowerabovethisvalueLabel = uilabel(app.UIFigure);

app.EliminatepowerabovethisvalueLabel.HorizontalAlignment = 'right';

app.EliminatepowerabovethisvalueLabel.Position = [1 86 130 28];

app.EliminatepowerabovethisvalueLabel.Text = {'Eliminate power above '; 'this value'};

% Create EliValue

app.EliValue = uieditfield(app.UIFigure, 'numeric');

app.EliValue.ValueDisplayFormat = '%.0f';

app.EliValue.Position = [157 92 70 22];

% Create FFTPlotButton

app.FFTPlotButton = uibutton(app.UIFigure, 'push');

app.FFTPlotButton.ButtonPushedFcn = createCallbackFcn(app, @FFTPlotButtonPushed, true);

app.FFTPlotButton.Position = [68 26 100 22];

app.FFTPlotButton.Text = 'FFT Plot';

% Create UIAxes

app.UIAxes = uiaxes(app.UIFigure);

title(app.UIAxes, 'Title')

xlabel(app.UIAxes, 'X')

ylabel(app.UIAxes, 'Y')

app.UIAxes.Position = [244 56 397 417];

end

end

methods (Access = public)

% Construct app

function app = InrushCurrent_App1

% Create and configure components

createComponents(app)

% Register the app with App Designer

registerApp(app, app.UIFigure)

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

I have also tried with your answer (which -all plot) of but getting same error.

[Steven Lord]

MATLAB is case sensitive. The function name should be in all lower case.

[Sparsh Bansal]

Even when I delete the files in the MATLAB directory, 'which -all plot' call still shows all the plot.m in the folder. Is there some way to reload MATLAB? I have tried restarting MATLAB multiple times but they still persist.

Also these plot.m files were installed by MATLAB itself, I have not installed anything on my own, so how are they causing this error?

[Steven Lord]

Do not store your own personal files in any of the directories under matlabroot.

Do not delete any files in any of the directories under matlabroot unless specifically told to do so by Technical Support.

If you receive an error, post the full and exact text of the error you receive (all the text displayed in red, and if you see any text displayed in orange show that too) and show or describe exactly what you can do to reproduce the error.

Answer 2

[Eebs Ebola]

BEAUTIFUL!!!! Thank you so much.