error occurs like Error using cd Cannot CD to C:\Project (Name is nonexistent or not a directory). Reference to non-existent field 'filename'. Reference to non-existent field 'queryx'.

function varargout = CBIR(varargin)
%dbstop at 468 in CBIR
% CBIR M-file for CBIR.fig
%      CBIR, by itself, creates a new CBIR or raises the existing
%      singleton*.
%
%      H = CBIR returns the handle to a new CBIR or the handle to
%      the existing singleton*.
%
%      CBIR('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CBIR.M with the given input arguments.
%
%      CBIR('Property','Value',...) creates a new CBIR or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before CBIR_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to CBIR_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

% Copyright 2002-2003 The MathWorks, Inc.

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

% Last Modified by GUIDE v2.5 24-Apr-2011 00:18:13

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @CBIR_OpeningFcn, ...
                   'gui_OutputFcn',  @CBIR_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin == 0
initial_dir = pwd;
fig = openfig(mfilename,'reuse');
handles = guihandles(fig);
guidata(fig, handles);
%disp('populate1!!');
% Populate the listbox
load_listbox(initial_dir,handles)
% Return figure handle as first output argument
if nargout > 0
varargout{1} = fig;
end
elseif ischar(varargin{1}) % INVOKE NAMED SUBFUNCTION OR CALLBACK
try
[varargout{1:nargout}] = feval(varargin{:}); % FEVAL switchyard
catch
disp(lasterr);
end
end

% ------------------------------------------------------------

% --- Executes just before CBIR is made visible.
function CBIR_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 CBIR (see VARARGIN)

% Choose default command line output for CBIR
handles.output = hObject;
handles.option = 'input';
% Update handles structure
guidata(hObject, handles);

% UIWAIT makes CBIR wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = CBIR_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;

% --- Executes on selection change in listbox1.
function varargout = listbox1_Callback(h, eventdata, handles)
% hObject    handle to listbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns listbox1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from listbox1

mouse_event = get(handles.figure1,'SelectionType');
index_selected = get(handles.listbox1,'Value');
file_list = get(handles.listbox1,'String');
filename = file_list{index_selected};
if strcmp(mouse_event,'normal')
if ~handles.is_dir(handles.sorted_index(index_selected))
[~, ~, ext] = fileparts(filename);
switch ext
case '.bmp'
set(handles.selectButton, 'Enable', 'On');
case '.BMP'
set(handles.selectButton, 'Enable', 'On');
case '.jpg'
set(handles.selectButton, 'Enable', 'On');        
case '.JPG'
set(handles.selectButton, 'Enable', 'On');        
otherwise
set(handles.selectButton, 'Enable', 'Off');
end
end
end
if strcmp(mouse_event,'open')
if handles.is_dir(handles.sorted_index(index_selected))
cd (filename)
load_listbox(pwd,handles)
end
end
% ------------------------------------------------------------
% ------------------------------------------------------------
% Read the current directory and sort the names
% ------------------------------------------------------------

function load_listbox(dir_path,handles)
cd (dir_path)
dir_struct = dir(dir_path);
[sorted_names,sorted_index] = sortrows({dir_struct.name}');
handles.file_names = sorted_names;
handles.is_dir = [dir_struct.isdir];
handles.sorted_index = [sorted_index];
guidata(handles.figure1,handles)
set(handles.listbox1,'String',handles.file_names,...
'Value',1)
set(handles.text1,'String',pwd)
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes during object creation, after setting all properties.
% ------------------------------------------------------------
function listbox1_CreateFcn(hObject, eventdata, handles)
% hObject handle to listbox1 (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: listbox controls usually have a white background, change
%'usewhitebg' to 0 to use default.See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
set(hObject,'BackgroundColor','white');
else set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes during object creation, after setting all properties.
% ------------------------------------------------------------
function popupmenu_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: popupmenu controls usually have a white background on Windows.
%See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
% ------------------------------------------------------------

% Executes on selection change in popupmenu.
% ------------------------------------------------------------
function popupmenu_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: contents = get(hObject,'String') returns popupmenu contents as cell array
%contents{get(hObject,'Value')} returns selected item from popupmenu
val = get(hObject,'Value');
str = get(hObject, 'String');
cd(str{val});
load_listbox(pwd, handles)
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on selection of 'Quite' from the menubar.
% ------------------------------------------------------------
function quit_Callback(hObject, eventdata, handles)
% hObject handle to CloseMenuItem (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
selection = questdlg('Are you sure you want to quit?',...
['Close ' get(handles.figure1,'Name') '...'],...
'Yes','No','Yes');
if strcmp(selection,'No')
return;
end
delete(handles.figure1)
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on selection of 'Input To Database' from the menubar.
% ------------------------------------------------------------
function inputDatabase_Callback(hObject, eventdata, handles)
% hObject handle to CloseMenuItem (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Some code to input the selected image to the database...
set(handles.input, 'Checked', 'On');
set(handles.search, 'Checked', 'Off');
set(handles.listbox1, 'Enable', 'On');
set(handles.text1, 'Enable', 'On');
set(handles.popupmenu, 'Enable', 'On');
handles.option = 'input';
% This means that the option is to "input to database"...
guidata(hObject, handles)
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on selection of 'Search Database' from the menubar.
% ------------------------------------------------------------
function searchDatabase_Callback(hObject, eventdata, handles)
% hObject handle to CloseMenuItem (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Some code to search the database for the selected image...
set(handles.input, 'Checked', 'Off');
set(handles.search, 'Checked', 'On');
set(handles.listbox1, 'Enable', 'On');
set(handles.text1, 'Enable', 'On');
set(handles.popupmenu, 'Enable', 'On');
handles.option = 'search';
% This means that the option is to "search database"...
guidata(hObject, handles)
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on button press in selectbutton.
% ------------------------------------------------------------
function selectButton_Callback(hObject, eventdata, handles)
% hObject handle to selectButton (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
index_selected = get(handles.listbox1,'Value');
file_list = get(handles.listbox1,'String');
filename = file_list{index_selected};
[newpath,name,ext] = fileparts(filename);
handles.filename = strcat(name,ext);
[handles.queryx] = imread(filename);
for z=1:256
    y(z)=0;
end
y=y';
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[handles.querymap] = 0:0.003921568627:1;
[handles.querymap] = (handles.querymap)';
handles.querymap = [handles.querymap,y,y];
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%read the image file.
cd('C:\Project');
figure
imshow(handles.queryx); %This displays the image.
% Obtain HSV format of the image...
%handles.queryhsv = rgb2hsv(handles.querymap);
guidata(hObject,handles)
set(handles.selectButton, 'Enable', 'Off');
set(handles.listbox1, 'Enable', 'Off');
set(handles.text1, 'Enable', 'Off');
set(handles.popupmenu, 'Enable', 'Off');
set(handles.input, 'Enable', 'Off');
set(handles.search, 'Enable', 'Off');
% handles.option
switch handles.option
case 'input'
set(handles.inputButton, 'Enable', 'On');
case 'search'
set(handles.searchButton, 'Enable', 'On');
end
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on button press in inputButton.
% ------------------------------------------------------------
function inputButton_Callback(hObject, eventdata, handles)
% hObject handle to transform1button (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
set(handles.inputButton, 'Enable', 'Off');
% Open database txt file... for reading...
fid = fopen('database.txt');
exists = 0;
while 1
tline = fgetl(fid);
if ~ischar(tline), break, end
% Meaning: End of File...
if (strcmp(tline, handles.filename))
exists = 1;
break;
end
end
fclose(fid);
if ~exists
fid = fopen('database.txt', 'a');
fprintf(fid,'%s\r',handles.filename);
fclose(fid);
end
guidata(hObject, handles)
msgbox('Database updated with file name...', 'Success...');
set(handles.input, 'Checked', 'Off');
set(handles.search, 'Checked', 'Off');
set(handles.input, 'Enable', 'On');
set(handles.search, 'Enable', 'On');
% ------------------------------------------------------------
% ------------------------------------------------------------
% Executes on button press in searchButton.
% ------------------------------------------------------------
function searchButton_Callback(hObject, eventdata, handles)
% hObject handle to transform2button (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
set(handles.searchButton, 'Enable', 'Off');
% Colour search...
% Open database txt file... for reading...

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5

%              color part starting

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

fid = fopen('database.txt');
resultValues = [];
% Results matrix...
resultNames = {};
i = 1;
% Indices...
j = 1;
for z=1:256
    y(z)=0;
end
y=y';
while 1
imagename = fgetl(fid);
if ~ischar(imagename), break, end
% Meaning: End of File...
[X] = imread(imagename);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
RGBmap =  0:0.003921568627:1;
RGBmap = RGBmap';
RGBmap = [RGBmap,y,y];
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%HSVmap = rgb2hsv(RGBmap);
D = quadratic(handles.queryx, handles.querymap, X, RGBmap);
resultValues(i) = D;
resultNames(j) = {imagename};
i = i + 1;
j = j + 1;
end
fclose(fid);
% Sorting colour results...
[sortedValues, index] = sort(resultValues);
% Sorted results... the vector index
% is used to find the resulting files.
fid = fopen('colourResults.txt', 'w+');
% Create a file, over-write old ones.
for i = 1:10
% Store top 10 matches...
tempstr = char(resultNames(index(i)));
fprintf(fid, '%s\r', tempstr);

disp(resultNames(index(i)));
disp(sortedValues(i));
disp(' ');
end
fclose(fid);
%return;
disp('Colour part done...');
disp('Colour results saved...');
disp('');
displayResults('colourResults.txt', 'Colour Results...');

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5

%              texture part starting

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

disp('Texture part starting...');
% Texture search... 
queryEnergies = obtainEnergies(handles.queryx, 6);
% Obtain top 6 energies of the image.
% Open colourResults txt file... for reading...
fid = fopen('colourResults.txt');
fresultValues = [];
% Results matrix...
fresultNames = {};
i = 1;
% Indices...
j = 1;
while 1
imagename = fgetl(fid);
if ~ischar(imagename), break, end
% Meaning: End of File...
[X] = imread(imagename);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
imageEnergies = obtainEnergies(X, 6);
E = euclideanDistance(queryEnergies, imageEnergies);
fresultValues(i) = E;
fresultNames(j) = {imagename};
i = i + 1;
j = j + 1;
end
fclose(fid);
disp('Texture results obtained...');
% Sorting final results...
[sortedValues, index] = sort(fresultValues);
% Sorted results...the vector index
% is used to find theresulting files.

fid = fopen('textureResults.txt', 'w+');
% Create a file, over-write old ones.
for i = 1:5
% Store top 5 matches...
imagename = char(fresultNames(index(i)));
fprintf(fid, '%s\r', imagename);
disp(imagename);
disp(sortedValues(i));
disp(' ');
end
fclose(fid);
disp('Texture results saved...');
displayResults('textureResults.txt', 'Texture Results...');

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
guidata(hObject,handles)
set(handles.input, 'Checked', 'Off');
set(handles.search, 'Checked', 'Off');
set(handles.input, 'Enable', 'On');
set(handles.search, 'Enable', 'On');
% ------------------------------------------------------------

[Walter Roberson]

duplicates http://uk.mathworks.com/matlabcentral/answers/233373-respected-sir-i-have-code-of-content-based-medical-image-retrieval-but-this-is-not-working-n-when-i