GUI Matrix dimensions must agree.

function numberdetect_Callback(hObject, eventdata, handles)
global t
global t1
t=timer('TimerFcn',{@timerCallback3,handles},'ExecutionMode', 'fixedDelay','Period', 0.1);
guidata(hObject,handles);
stop(t1);
start(t);

function timerCallback3(hObject, eventdata, handles)
global vid
global t
global frame
global c
if (vid==-1)
    msgbox('請首先進行預覽！');
    stop(t);
    return;
end

frame=getsnapshot(vid);
imagen = rgb2gray(frame);
threshold = graythresh(imagen);
i_bw = ~im2bw(imagen,threshold);
i_bw2 = bwareaopen(i_bw,30);
i_bw3 = imclearborder(i_bw2);
re=i_bw3;
load templates
    [fl re]=lines(re);
    imgn=fl;
    [L Ne] = bwlabel(imgn);
    word = [];
    for n=1:Ne
        [r,d] = find(L==n);
        n1=imgn(min(r):max(r),min(d):max(d));
        img_r=imresize(n1,[42 24]);
        comp=[];
        for n=1: 24 : 240
            sem=Corr2(templates(1:42,n:n+23),img_r);
            comp=[comp sem];
        end
        vd=find(comp==max(comp));
        %*-*-*-*-*-*-*-*-*-*-*-*-*-
        if vd==1
            letter='1';
        elseif vd==2
            letter='2';
        elseif vd==3
            letter='3';
        elseif vd==4
            letter='4';
        elseif vd==5
            letter='5';
        elseif vd==6
            letter='6';
        elseif vd==7
            letter='7';
        elseif vd==8
            letter='8';
        elseif vd==9
            letter='9';
        else
            letter='0';
        end
      word = [word letter];
    end

      if word == '40'
      set(handles.text2,'string','40');
      else 
          set(handles.text2,'string','no');
      end
      axes(handles.axesshow);
   imshow(imagen);

    end

function r = Corr2(A,B)
A = A - mean2(A);
B = B - mean2(B);
r = sum(sum(A.*B))/sqrt(sum(sum(A.*A))*sum(sum(B.*B)));

function [fl re]=lines(im_texto)
im_texto=clip(im_texto);
fl=im_texto;%Only one line.
re=[ ];

function img_out=clip(img_in)
[f c]=find(img_in);
img_out=img_in(min(f):max(f),min(c):max(c));%Crops image

I am use this function on guide but show the error: Matrix dimensions must agree.

Answer 1

[Walter Roberson]

You have

        if word == '40'

Do not use "==" to compare character vectors. == does element-by-element comparison, word(1) compared to the first character of '40', word(2) compared to the second character of '40', word(3) compared to ... error, there is no third character of '40' .

You should use strcmp() to compare anything that is not known for certain to be a single character.

[tsai kai shung]

but strcmp() seem to output 0 or 1 how can i use output i want the number

[Walter Roberson]

What would you have expected the output of word == '40' to be?

[tsai kai shung]

become number = 40 not character

[tsai kai shung]

i use set(handles.text2,'string',word); but i don't want output 40 words other than

[tsai kai shung]

xx = '40';
    aa = strcmp(word,xx);
    if aa == 1
        set(handles.text2,'string','40');
    else
        set(handles.text2,'string','error');
    end

i use this can success thank you!

[Walter Roberson]

if strcmp(word, '40')
  set(handles.text2,'string','40')
else
  set(handles.text2,'string','error');
end