??? Subscripted assignment dimension mismatch.

Hi can someone please help me with this error, below is my code

close all;

clear all;

dbstop if error

lambda2 = [2 4 6 8];

theta2 = [0*pi/180, 45*pi/180, 90*pi/180, 135*pi/180, 180*pi/180, 225*pi/180, 270*pi/180, 315*pi/180];

no_lamd = 4;

no_theta = 8;

psi = [0 pi/2];

gamma = 0.5;

bw = 1;

N = 1;

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

ext = '.bmp';

dirr = 'H:\MATLAB\imgb\sign40\';

[tr_data] = textread('GPDS_40.txt','%s'); %train

[mtr ntr] = size(tr_data);%mtr

%assign class no

model = 40;

train = 5;

cnt = 0;

for i = 1:5:5*model

    cnt =  cnt + 1;

    for j =  0:1:4

         ts_class(i+j)=cnt;
    end

end

save ts_class ts_class

%select train image

cnt1 = 0;

cnt2 = 0;

for j = 1:20:20*model

    for i  =  0:1:4

        cnt1  =  cnt1+1;

        AR_train(cnt1) =  tr_data(j+i);

    end

    cnt2  =  cnt2+1;

    AR_test(cnt2) =  tr_data(j+5);

end size (AR_train');

size (AR_test');

%%%%%%%%%%%%%%%%%gabor train%%%%%%%%%%

c=0;

for x = 1:1:model*train

    tr_im = AR_train(x);

    tr_com = strcat(dirr,tr_im,ext);

    tmp_tr =imread (char(tr_com));

    col_size = 80*1.3; 

    row_size = 100*1.3; 

    im1 = im2double(tmp_tr);

    F1 = imcrop (im1,[150 70 col_size-1 row_size-1]);

    img_in = im2double(F1);

    for m = 1:1:no_lamd

        for n =1:1:no_theta

            clear gb;

            clear img_out;

            clear img_out_disp;

            lambda = lambda2(m)

            theta = theta2(n)

            c = c + 1; 

            gb_train = c

            gb = gabor_fn(bw,gamma,psi(1),lambda,theta)...%gb is the n-th gabor filter  
                +1i * gabor_fn(bw,gamma,psi(2),lambda,theta);

            img_out(:,:,n) = imfilter(img_in, gb, 'symmetric');

            img_out_disp = sum(abs(img_out).^2,3).^0.5;      %default superposition method, L2-norm 

            img_out_train(:,:,c) = (img_out_disp./max(img_out_disp(:)));%normalize  (THIS IS THE ERROR) 

        end

    end

end

[Wayne King]

img_out_train(:,:,c) = (img_out_disp./max(img_out_disp(:)));%

You should show what the sizes are of these inputs, img_out_train and img_out_disp

[Mo]

there are 800 images all together and divided for train and test.

the size of img_out_disp is 130*104, set by col_size and row_size

the size of img_out_disp is 130*104*32, which i dont understand why the code only read until image num 32 and then got error when is 33.

Im assuming since lambda is set to [2 4 6 8], it reads 8 times for each lambda thats why it stop at 32 and face problem with dimension. please help

[Jan]

The code is hard to read. Please use the standard code formatting as described in the "Markup help" link.

For the "clear all" see: http://www.mathworks.com/matlabcentral/answers/16484-good-programming-practice#answer_22301 . Clearing the variables wastes time here without any benefits.

Answer 1

[Sean de Wolski]

dbstop if error %enter this at the command line

Then run your program. It'll stop at the error, and look at the size of the RHS, and the size of the spot you're trying to stick it on the LHS. The size discrepancy will hopefully be obvious.

Answer 2

[Fangjun Jiang]

I am copying my answer to another question here.

The error is due to, well, "Subscripted assignment dimension mismatch".

Try this example to see it:

a=zeros(3,4);
a(:,1)=rand(5);

Put a break point at the line where the error happened, then check the size of the right hand variable and left hand variable. For example, in the above example:

>> size(rand(4))
ans =
     4     4
>> size(a(:,1))
ans =
     3     1

They apparently don't match.