A Self-Adaptive Fuzzy c-Means Algorithm for Determining the Optimal Number of Clusters

Algorithm 1

Density-based algorithm.

Input: Dataset and

Output: and

;

dc = cutoffdis ();         Calculate the cutoff distance dc.

;

;  The number of object corresponding to sorted

.

;

;   The cluster number that each object belongs to, with initial

value −1.

for to do

 if then      dose not

 belong to any cluster and the nmber of its neighbors is greater than 1.

  ;

  for do

   ;

  ;

;