Bayesian Network

[zak100]

Hi,

I am trying to understand the Bayesian network. I understand it is based upon conditional probabilities. I need a quick tutorial for it. I found an example on Wikepedia: https://en.wikipedia.org/wiki/Bayesian_network, but the mathematical formulae are creating problem. Somebody please guide me the example discussed in the wikepedia. I want to understand the 3 tables and the graph.

 

Zulfi.

 

 

 

[Ghideon]

4 hours ago, zak100 said:

the mathematical formulae are creating problem.

I recommend you to adress that first; https://en.m.wikipedia.org/wiki/Conditional_probability

the wikipedia page looks decent and links to further sources that may help you gather the background knowledge required to start understanding  Bayesian network.

[zak100]

Hi,

I have got the formula for conditional probability:

 

 

Above is the formula for conditional probabilities. I don’t know how to read it:

P(A|B) = conditional probability of occurring A if B has occurred.

 

Am I write?

 

Zulfi.

 

 

 

 

Hi,

I have got the following slide related to probability axiom from the following site:

http://www.eecs.qmul.ac.uk/~norman/BBNs/BBNs.htm

 

I have following questions about the probability axiom slide:

Q1. What is op? I think its op = opposite. But in the equation:

1 = P(a op -a)

Are they considering op same as “or”

What does Pi(alpha) represents in the last equation?

Some body please guide me.

 

Zulfi.