Table 4

Schematic illustration of a contingency table, and the derived statistics

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


Frow

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


Clustering-wise sensitivity 0.69

Clustering-wise PPV 0.85

Accuracy 0.77

Average cluster-wise separation 0.63

Average complex-wise separation 0.79

Clustering-wise separation 0.70

Brohée and van Helden BMC Bioinformatics 2006 7:488   doi:10.1186/1471-2105-7-488

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