draw image, How can I draw the image ? display cluster in an image

Hello, i have code, i need to draw image

my code

close all; clc; clear;

img = imread('pic7.png');
figure(), imshow(img);
impixelregion;

% nastavenie noveho obrazka
[y x z] = size(img)

for i=1:1:y
    for j=1:1:x

          imgNew(i, j, :) = 0;
      end
  end

[X_no_dither, map]= rgb2ind(img,12,'nodither');
figure, imshow(X_no_dither, map);
impixelregion;
img = im2double(X_no_dither)
P=size(img);

idx = kmeans(img,4,'emptyaction','singleton');

How can I draw the image back by?

Thank for help

[Tomas]

idx = kmeans(img,4,'emptyaction','singleton'); clusteredImage = zeros(size(X_no_dither)); clusteredImage(sub2ind(size(X_no_dither) , m(:,1),m(:,2)))=idx;

imshow(label2rgb(clusteredImage))

??? Error using ==> sub2ind at 58 Out of range subscript.

Error in ==> test at 29 clusteredImage(sub2ind(size(X_no_dither) , m(:,1),m(:,2)))=idx;