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Table 3

Results of validating SOM and k-means clustering approaches using historical precipitation data

  Number of clusters
 Validity indices 10 
K-means Silhouette 0.6 0.42 0.41 0.4 0.2 0.3 0.3 0.3 0.3 
SOM Index 0.72 0.56 0.5 0.47 0.61 0.42 0.37 0.34 0.32 
  Number of clusters
 Validity indices 10 
K-means Silhouette 0.6 0.42 0.41 0.4 0.2 0.3 0.3 0.3 0.3 
SOM Index 0.72 0.56 0.5 0.47 0.61 0.42 0.37 0.34 0.32 
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