title: Determining K-means cluster numbers in Python
body: <p>I have a trajectory dataset saved in a *<strong>.csv</strong> file and I sorted it according to month. I mean, I splitted it into different files according to month. Number of records in each file is different. For example, in January I have 10 thousands records but in April I have five hundred thousands records.</p>
  <p>I am going to perform <strong>k-mean</strong> clustering in python on each file. Could you please let me know how can I find or determine <strong>the best cluster number to initial K</strong>?</p>
  <p>Thank you</p>