Assigning word to different colour

I have a code using k means

for k = 1:(length(dirlist))

      img = imread([pathname, dirlist(k).name]);

flatImg = double(reshape(img,size(img,1)*size(img,2),size(img,3)));
idx = kmeans(flatImg,3); 

end

I have around 20 images ,I have specified k=3,so for each colour i need to specify a word such as A,B,C

please tell how toprocess

[Walter Roberson]

What "word" are you referring to in your question, that is to be assigned a different color?

[kash]

words aor letters such as

A for one colour

B for another colour

C for another colour

[kash]

for example the output of idx will consists of 1's,2's,3's

so want to assign A for 1

B for 2

C for 3

[Walter Roberson]

The output of idx is not colors, it is cluster numbers.

[Image Analyst]

Why do you want to do this? Why not just turn it back into an image? What are you going to do with a character array?

Answer 1

[Walter Roberson]

cluster_letter = char('A' + idx - 1);

[kash]

i did the following

for k = 1:(length(dirlist))

        img = imread([pathname, dirlist(k).name]);

flatImg = double(reshape(img,size(img,1)*size(img,2),size(img,3)));
idx = kmeans(flatImg,3); 
N{k}=(reshape(idx,size(img,1),size(img,2)))
cluster_letter = char('A' + idx - 1)
Ncluster{k}=(reshape(cluster_letter,size(img,1),size(img,2)))
end

i get the answer, but in variable editor i get all values in same cell ,i need each letter in each cell