whenever i call the recognition push button in my gui interface the error message is showing

CODE

% --- Executes on button press in Recognation.
function Recognation_Callback(hObject, eventdata, handles)
% hObject    handle to Recognation (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

CCoeff = corr2(A,B)
  if CCoeff > 0.7 % (choose a value < 1) % image 1 and image 2 are compared
      msgbox('Both A and B are similar', 'MESSAGE');
  else
      msgbox('A and B are not similar', 'MESSAGE');
  end

ERROR

  Error in matching (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)matching('Recognation_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.

Answer 1

[Geoff Hayes]

indrani - you haven't posted the full error message but presumably it has something to do with

CCoeff = corr2(A,B)

where A and B aren't defined. How or where have these variables been set previously in your code? Consider adding them to the handles structure so that all callbacks have access to this data. See guidata for details on how you can do this.

[indrani dalui]

dear sir,

thank you for your responce .sir please,guide me what shouled i do.

[Geoff Hayes]

How or where have these variables been set previously in your code? Please show the code...

[indrani dalui]

sir,

the code is addatced herewith.

[Geoff Hayes]

indrani - the only references to A and B in your code are in the line

CCoeff = corr2(A,B)

Where are they being set if not in the matching.m file?

[indrani dalui]

sir, if i want to put the following code instade of the previous matching part what changes should i have to make.

% FINGERPRINT MATCHING SCORE
%
% Usage:  [ S ] = match( M1, M2, display_flag );
%
% Argument:   M1 -  First Minutiae 
%             M2 -  Second Minutiae
%             display_flag
%               
% Returns:    S - Similarity Measure

function [ S ] = match( M1, M2, display_flag )
    if nargin==2; display_flag=0; end
    M1=M1(M1(:,3)<5,:);
    M2=M2(M2(:,3)<5,:);    
    count1=size(M1,1); count2=size(M2,1); 
    bi=0; bj=0; ba=0; % Best i,j,alpha
    S=0;            % Best Similarity Score
    for i=1:count1
        T1=transform(M1,i);
        for j=1:count2
            if M1(i,3)==M2(j,3)
                T2=transform(M2,j);
                for a=-5:5                      %Alpha
                    T3=transform2(T2,a*pi/180);
                    sm=score(T1,T3);
                    if S<sm
                        S=sm;
                        bi=i; bj=j; ba=a;
                    end                
                end
            end
        end
    end
    if display_flag==1
        figure, title(['Similarity Measure : ' num2str(S)]);
        T1=transform(M1,bi);
        T2=transform(M2,bj);
        T3=transform2(T2,ba*pi/180);
        plot_data(T1,1);
        plot_data(T3,2);
    end
end

[Geoff Hayes]

Where would you put this call to match in your GUI? How are the inputs to this function defined?