k-means clustering: save the number of iterations in a matrix

Hello,

With the following command the number of iterations are displayed in the Command Window.

idx = kmeans(X,30,'display','iter');

iter   phase       num           sum
   1       1       365       40.9896
   2       1        60       37.0645
   3       1        18        36.001
   4       1         3       35.7457
   5       1         1       35.6472
   6       2        39       34.8684
   7       2        32       34.1611
   8       2        16       33.7392
   9       2        11       33.3268
  10       2         4       33.2144
  11       2         1       33.2046
11 iterations, total sum of distances = 33.2046

Is there a way to save the displayed number of iterations and the total sum of distances in a matrix stored in the Workspace?

Thank you. Best,

Pavlos

Answer 1

[David Sanchez]

[IDX,C,sumd,D]  = kmeans(X,30,'display','iter');

where

sum(sumd)

is the sum of distances The number of iterations is not stored in any variable

Answer 2

[Phu Lai]

Another way around to get the number of iterations is modifying the kmeans.m source code :)