Getting following error,wht is the solution

* * *This is demo Part* * *
% Change the current folder to the folder of this m-file.
if(~isdeployed)
  cd(fileparts(which(mfilename))); 
end

try
  % Check that user has the Image Processing Toolbox installed.
  hasIPT = license('test', 'image_toolbox');
  if ~hasIPT
    % User does not have the toolbox installed.
    message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
    reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
    if strcmpi(reply, 'No')
      % User said No, so exit.
      return;
    end
  end
    catch ME
  errorMessage = sprintf('Error running this m-file:\n%s\n\nThe error message is:\n%s', ...
    mfilename('fullpath'), ME.message);
  errordlg(errorMessage);
end
  % Continue with the demo.  Do some initialization stuff.
  close all;
  fontSize = 14;
  figure;
  % Maximize the figure. 
  set(gcf, 'Position', get(0, 'ScreenSize')); 
  set(gcf,'name','image','numbertitle','off') 

  % Change the current folder to the folder of this m-file.
  % (The line of code below is from Brett Shoelson of The Mathworks.)
  if(~isdeployed)
    cd(fileparts(which(mfilename)));
  end

  % Ask user if they want to use a demo image or their own image.
  message = sprintf('Do you want use a standard demo image,\nOr pick one of your own?');
  reply2 = questdlg(message, 'Which Image?', 'Demo','My Own', 'Demo');
  % Open an image.
  if strcmpi(reply2, 'Demo')
    % Read standard MATLAB demo image.
    message = sprintf('Which demo image do you want to use?');
    selectedImage = questdlg(message, 'Which Demo Image?', 'Onions', 'Peppers', 'Stained Fabric', 'Onions');
    if strcmp(selectedImage, 'Onions')
      fullImageFileName = 'onion.png';
    elseif strcmp(selectedImage, 'Peppers')
      fullImageFileName = 'peppers.png';
    else
      fullImageFileName = 'fabric.png';
    end
  else
    % They want to pick their own.
    % Change default directory to the one containing the standard demo images for the MATLAB Image Processing Toolbox. 
    originalFolder = pwd; 
    folder = fullfile(matlabroot,'\toolbox\images\imdemos');
    if ~exist(folder, 'dir') 
      folder = pwd; 
    end 
    cd(folder); 
    % Browse for the image file. 
    [baseFileName, folder] = uigetfile('*.*', 'Specify an image file'); 
    fullImageFileName = fullfile(folder, baseFileName); 
    % Set current folder back to the original one. 
    cd(originalFolder);
    selectedImage = 'My own image'; % Need for the if threshold selection statement later.
  end

  % Check to see that the image exists.  (Mainly to check on the demo images.)
  if ~exist(fullImageFileName, 'file')
    message = sprintf('This file does not exist:\n%s', fullImageFileName);
    WarnUser(message);
    return;
  end
im=imread(fullImageFileName);
%im1=rgb2luv;
r=im(:,:,1);
g=im(:,:,2);
b=im(:,:,3);
[r1,c]=meshgrid(1:size(im,1),1,size(im,2));
* *data_vecs=[r(:),g(:),b(:),r1(:),c(:)];* *
[data_idxs centroids]=kmeansseg(data_vecs,k);
d=reshape(data_idxs,size(im,1),size(i,2));
subplot(221),imshow(im),title('Original image'),suplot(222),imshow(d),title('kmean clustered image');

• getting following error *

??? Error using ==> horzcat CAT arguments dimensions are not consistent.

Error in ==> kmeanssegdemo at 81 data_vecs=[r(:),g(:),b(:),r1(:),c(:)];

Answer 1

[Image Analyst]

When you set a breakpoint on that line, what does it tell you the sizes of r,g,b,r1, and c are? Evidently they're not all the same size - that's what "dimensions are not consistent." means.