Answers.Body: <p><code>1_{c^(i) = j}</code> means if <code>c^(i)</code> is equal to <code>j</code> the value is 1 and zero otherwise. </p>
  
  <p>In summary, k-means try to solve Voronoi cells for each mean point, and then update mean of members of a cell and update Voronoi cells again. This step is repeated until there is no change in members of the cells.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-23T03:49:03.863Z
Answers.Text: Is `mu(j)` a vector? 
  I am confused about `I` and `j`. what do counter these 2 letters?
Answers.UserDisplayName: user3486308
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-23T10:51:57.313Z
Answers.Text: @user8663682 `mu(j)` is mean of members of the cluster `j` at each step, and `c^(i)` is index of the cluster which is assigned to the point of `x_i`.
Answers.UserDisplayName: OmG
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-22T19:40:24.343Z
Answers.LastActivityDate: 2017-12-22T19:40:24.343Z
Answers.UserDisplayName: OmG
Body: <p>I can't understand the red box. what do does that <code>1</code> do before <code>{c(I)=j}</code> ?
  Also how does all the algorithms work? May someone explains the to steps more clearly by one example!</p>
  
  <p><a href="https://i.sstatic.net/ylp04.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ylp04.png" alt="enter image description here"></a></p>
  
Tags: <algorithm><unsupervised-learning>
Title: How does this part of algorithm works?(K-means)
UserDisplayName: user3486308
ThreadText: # How does this part of algorithm works?(K-means)
  
  (Asked by: username_0 on 2017-12-22)
  
  I can't understand the red box. what do does that `1` do before `{c(I)=j}` ?
  Also how does all the algorithms work? May someone explains the to steps more clearly by one example!
  
  [![enter image description here](https://i.sstatic.net/ylp04.png)](https://i.sstatic.net/ylp04.png)
  
  **Tags:** algorithm, unsupervised-learning
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2017-12-22. Score: 0 | Accepted answer
  
  `1_{c^(i) = j}` means if `c^(i)` is equal to `j` the value is 1 and zero otherwise.
  
  In summary, k-means try to solve Voronoi cells for each mean point, and then update mean of members of a cell and update Voronoi cells again. This step is repeated until there is no change in members of the cells.
  
  > **Comments:**
  > **username_0**: Is `mu(j)` a vector?  I am confused about `I` and `j`. what do counter these 2 letters?  
  > **username_1**: @user8663682 `mu(j)` is mean of members of the cluster `j` at each step, and `c^(i)` is index of the cluster which is assigned to the point of `x_i`.  
  
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