How to solve error Error using - ?

>> uji
Error using  - 
Matrix dimensions must agree.

Error in fknn (line 81)
    distances = (repmat(test(i,:), num_train,1)-data).^2;

Error in classification (line 7)
[y,memberships]=fknn(sampel,training_class, uji,testing_class, K, info);

Error in uji>pushbutton16_Callback (line 219)
classification();

Error in gui_mainfcn (line 95)
        feval(varargin{:});

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

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)uji('pushbutton16_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback

[KSSV]

Only you pasted error....how you expect us to know what made you to get the error?

Answer 1

[Walter Roberson]

Your data is RGB and so is 3 dimensional, but your code expects it to be 2 dimensional.