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Table 4 Schematic illustration of a contingency table, and the derived statistics

From: Evaluation of clustering algorithms for protein-protein interaction networks

Counts
T cluster 1 cluster 2 cluster 3 cluster 4 cluster 5 sum complex size
complex 1 7 0 0 0 0 7 7
complex 2 0 6 8 0 0 14 14
complex 3 0 0 0 14 3 17 20
complex 4 0 0 0 4 5 9 8
sum 7 6 8 18 8 47  
cluster size 7 6 8 16 8   
Positive Predictive Value (PPV)
PPV cluster 1 cluster 2 cluster 3 cluster 4 cluster 5   
complex 1 1 0 0 0 0   
complex 2 0 1 1 0 0   
complex 3 0 0 0 0.78 0.38   
complex 4 0 0 0 0.22 0.62   
cluster-wise PPV 1 1 1 0.78 0.62   
Sensitivity
Sn cluster 1 cluster 2 cluster 3 cluster 4 cluster 5 complex-wise Sn  
complex 1 1 0 0 0 0 1  
complex 2 0 0.43 0.57 0 0 0.57  
complex 3 0 0 0 0.70 0.15 0.70  
complex 4 0 0 0 0.50 0.62 0.62  
Frequency per row
F row cluster 1 cluster 2 cluster 3 cluster 4 cluster 5   
complex 1 1 0 0 0 0   
complex 2 0 0.43 0.57 0 0   
complex 3 0 0 0 0.82 0.18   
complex 4 0 0 0 0.44 0.56   
Separation
C cluster 1 cluster 2 cluster 3 cluster 4 cluster 5 complex-wise separation  
complex 1 1 0 0 0 0 1  
complex 2 0 0.43 0.57 0 0 1  
complex 3 0 0 0 0.64 0.07 0.71  
complex 4 0 0 0 0.10 0.35 0.45  
cluster-wise separation 1 0.43 0.57 0.74 0.41   
  1. Clustering-wise sensitivity 0.69
  2. Clustering-wise PPV 0.85
  3. Accuracy 0.77
  4. Average cluster-wise separation 0.63
  5. Average complex-wise separation 0.79
  6. Clustering-wise separation 0.70