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Table 1 Examples for the numerical representation of herbal formulae

From: Herb network construction and co-module analysis for uncovering the combination rule of traditional Chinese herbal formulae

Formula

herb1

herb2

herb3

herb4

herb5

herb6

herb7

herb8

herb9

herb10

Formula 1

0

0.5

0

0.25

0

1

0

0

0.75

0

Formula 2

0.375

0.625

0.875

0.125

0.75

0

1

0.25

0

0.5

Formula 3

0.5

0

0

0

0

1

0

0

0

0

  1. *Assume there are a total of 10 herbs denoted by herb1, herb2…herb10 (j=1, 2…,10), and three herbal formulae containing the following herbs in sequence (i=1,2,3): Formula 1: herb4, herb2, herb9 and herb6 (k=4); Formula 2: herb4, herb8, herb1, herb10, herb2, herb5, herb3 and herb7 (k=8); and Formula 3: herb1 and herb6 (k=2). For herb2 in Formula 1, we calculated that a 12 =2 and b 12 =2/4=0.5. The matrix representation for this artificial data set is shown in the table.