pygmi.clust.var_ratio#
Variance Ratio.
Functions#
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Variance Ratio. |
Module Contents#
- pygmi.clust.var_ratio.var_ratio(data, uuu, center, dist_orig)#
Variance Ratio.
Calculates the Variance ratio criterion after Calinski and Harabasz, 1974. Does not accept missing data. Max VRC is optimal.
- Parameters:
data (numpy array) – input dataset
uuu (numpy array) – membership matrix (FCM) or cluster index values (k-means)
center (numpy array) – cluster centers
dist_orig (numpy array)
- Returns:
vrc – variance ration criterion
- Return type:
numpy array