how to calculate the expected support?

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Mira le 2021-7-27

Hello every one

I have a database

12 20 12 3 15

12 100 5 4 10

100 12 20 45 103

each value in D has its corresponding probability like this

0.2 0.9 0.5 1 0.6

0.7 0.1 0.6 0.9 0.4

0.8 0.3 0.1 0.2 0.2

I want to calculate the expected support wchich is computed as follow:

for example:

expected support(12)=0.2+0.7+0.3=1.2 (each individual calculate as the sum of its probability in the whole database)

expected support (12,20) we compute this by the sum of the product of the probability of 12 and 20

expected support(12,20)=(0.2*0.9)+(0.3*0.2)=0.24

I want to implement this in matlab which the source code is fast and simple

Thank you

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