How can I solve the following error of the code segment?

% function main
clc;
clear all;
close all;

im = imread('3.jpg');

subplot(2,1,1),imshow(im);
subplot(2,1,2),imhist(im(:,:,1));
title('INPUT IMAGE HISTOGRAM');%figure,imhist(im(:,:,2)),title('blue');figure,imhist(im(:,:,3)),title('Green');

figure;
% j=);
I = imnoise(im,'salt & pepper',0.02);
subplot(1,2,1),imshow(I);
title('Noise adition and removal using median filter');
K = medfilt2(I);
subplot(1,2,2),imshow(K);


im = double(im);
s_img = size(im);
r = im(:,:,1);
g = im(:,:,1);
b = im(:,:,1);
% [c r] = meshgrid(1:size(i,1), 1:size(i,2));
data_vecs = [r(:) g(:) b(:)];

k= 4;

[ idx C ] = kmeansK( data_vecs, k );
% d = reshape(data_idxs, size(i,1), size(i,2));
% imagesc(d);

palette = round(C);

%Color Mapping
idx = uint8(idx);
outImg = zeros(s_img(1),s_img(2),3);
temp = reshape(idx, [s_img(1) s_img(2)]);
for i = 1 : 1 : s_img(1)
    for j = 1 : 1 : s_img(2)
        outImg(i,j,:) = palette(temp(i,j),:);
    end
end

cluster1 = zeros(size(r));
cluster2 = zeros(size(r));
cluster3 = zeros(size(r));
cluster4 = zeros(size(r));

figure;
cluster1(find(outImg(:,:,1)==palette(1,1))) = 1;
subplot(2,2,1), imshow(cluster1);
cluster2(find(outImg(:,:,1)==palette(2,1))) = 1;
subplot(2,2,2), imshow(cluster2);
cluster3(find(outImg(:,:,1)==palette(3,1))) = 1;
subplot(2,2,3), imshow(cluster3);
cluster4(find(outImg(:,:,1)==palette(4,1))) = 1;
subplot(2,2,4), imshow(cluster4);

cc = imerode(cluster4,[1 1]);
figure,imshow(imerode(cluster4,[1 1]));
title('eroded image');

[label_im, label_count] = bwlabel(cc,8); 
stats = regionprops(label_im, 'Centroid');

for i=1:label_count
    area(i) = stats(i).Centroid;
end

[maxval, maxid] = max(area);

label_im(label_im ~= maxid) = 0;
label_im(label_im == maxid) = 1;

figure,imshow(label_im);
title('tumour');

% outImg = uint8(outImg);
% imtool(outImg);


code_end = 1;

ERROR:

Subscripted assignment dimension mismatch.
Error in main (line 70)
    area(i) = stats(i).Centroid;

[per isakson]

I fail to reproduce your problem, I get

Undefined function or variable 'kmeansK'.
Error in cssm (line 25)
    [ idx, C ] = kmeansK( data_vecs, k ); 
>> 

What's kmeansK

See: Debug a MATLAB Program and Examine Values While Debugging

[Geoff Hayes]

Syed - stats(i).Centroid could be of different dimension on each iteration of your loop, so consider making area a cell array. Also, consider renaming this variable to avoid conflicts with the MATLAB built-in function of the same name (see area).

[Syed Zenith Rhyhan]

https://www.mathworks.com/matlabcentral/profile/authors/4211382-geoff-hayes.

Sir,Here i attached the full matlab project file of brain tumor detection.Kindly review it and resolve the error please.Matlab 2017a version

[Walter Roberson]

We do not have 1.bmp or 3.bmp

[Syed Zenith Rhyhan]

Sir,I extremly sorry for the upload of wrong matlab files.Here the corrected files which I will work.Please consider the mistake and resolve the follwing error occured

Error:

Subscripted assignment dimension mismatch.

Error in main (line 70)

area(i) = stats(i).Centroid;

[Walter Roberson]

Centroid is a vector of at least 2 elements (it will have the same number of entries as ndims applied to the image.) You cannot store a vector into a scalar location area(i)

Answer 1

[Walter Roberson]

The line of code with the error does not occur in the code you attached. Your current code calls upon Area, which does not exist in the field because your current code asks regionprops for Centroid.

Centroid is a vector of at least 2 elements (it will have the same number of entries as ndims applied to the image.) You cannot store a vector into a scalar location area(i)

[Syed Zenith Rhyhan]

How can i solve this problem in matlab coding

[Walter Roberson]

area(i) = stats(i).Centroid(1) + 1i * stats(i).Centroid(2);

You are now able to store the two pieces of information into a single location, one coded into the real() of the location and the other coded into the imag() of the location.

[Syed Zenith Rhyhan]

Thank you so much,Sir for your kind response and feedback