Unrecognized function or variable 'MWplotcal​cIntegT_Op​eningFcn'

function varargout = MWplotcalcInteGUI(varargin)
% PLOTANDCALCINTEGRALTOOL MATLAB code for plotandcalcIntegralTool.fig
%      PLOTANDCALCINTEGRALTOOL, by itself, creates a new PLOTANDCALCINTEGRALTOOL or raises the existing
%      singleton*.
%
%      H = PLOTANDCALCINTEGRALTOOL returns the handle to a new PLOTANDCALCINTEGRALTOOL or the handle to
%      the existing singleton*.
%
%      PLOTANDCALCINTEGRALTOOL('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in PLOTANDCALCINTEGRALTOOL.M with the given input arguments.
%
%      PLOTANDCALCINTEGRALTOOL('Property','Value',...) creates a new PLOTANDCALCINTEGRALTOOL or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before plotandcalcIntegralTool_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to plotandcalcIntegralTool_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help plotandcalcIntegralTool

% Last Modified by GUIDE v2.5 05-May-2020 21:57:55

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @MWplotcalcIntegT_OpeningFcn, ...
                   'gui_OutputFcn',  @MWplotcalcIntegT_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before plotandcalcIntegralTool is made visible.
function MWplotcalcInteGUI_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to plotandcalcIntegralTool (see VARARGIN)

% Choose default command line output for plotandcalcIntegralTool
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);
MWplotcalcInteGUI(handles);
% UIWAIT makes plotandcalcIntegralTool wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = MWplotcalcInteGUI_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;



function xleftText_Callback(hObject, eventdata, handles)
% hObject    handle to xleftText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of xleftText as text
%        str2double(get(hObject,'String')) returns contents of xleftText as a double
xleftstr=get(handles.xleftText,'String');
xleft=str2double(xleftstr);
set(handles.xleftSlider1,'Value',xleft);
MWplotcalcInteGUI(handles);

% --- Executes during object creation, after setting all properties.
function xleftText_CreateFcn(hObject, eventdata, handles)
% hObject    handle to xleftText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function xrightText_Callback(hObject, eventdata, handles)
% hObject    handle to xrightText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of xrightText as text
%        str2double(get(hObject,'String')) returns contents of xrightText as a double
xrightstr=get(handles.xrightText,'String');
xright=str2double(xrightstr);
set(handles.xrightSlider,'Value',xright);
MWplotcalcInteGUI(handles);

% --- Executes during object creation, after setting all properties.
function xrightText_CreateFcn(hObject, eventdata, handles)
% hObject    handle to xrightText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on slider movement.
function xleftSlider1_Callback(hObject, eventdata, handles)
% hObject    handle to xleftSlider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
xleft=get(handles.xleftSlider1,'Value');
xleftstr=num2str(xleft);
set(handles.xleftText,'String',xleftstr);
MWplotcalcInteGUI(handles);

% --- Executes during object creation, after setting all properties.
function xleftSlider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to xleftSlider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function xrightSlider_Callback(hObject, eventdata, handles)
% hObject    handle to xrightSlider (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
xright=get(handles.xrightSlider,'Value');
xrightstr=num2str(xright);
set(handles.xrightText,'String',xrightstr);
MWplotcalcIntegT(handles);

% --- Executes during object creation, after setting all properties.
function xrightSlider_CreateFcn(hObject, eventdata, handles)
% hObject    handle to xrightSlider (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end

[Michael Williamson]

I can't seem to understand how I am getting the error.

Answer 1

[Geoff Hayes]

Michael - look at this code

gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @MWplotcalcIntegT_OpeningFcn, ...
                   'gui_OutputFcn',  @MWplotcalcIntegT_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);

The OpeningFcn and OutputFcn are defined to be MWplotcalcIntegT_OpeningFcn and MWplotcalcIntegT_OutputFcn respectively...neither of which exist in your code where the GUI is called MWplotcalcInteGUI. Try changing this code to

gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @MWplotcalcInteGUI_OpeningFcn, ...
                   'gui_OutputFcn',  @MWplotcalcInteGUI_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);         

which uses functions that are defined in your GUI.