giorgiaauroraadorni/likelihood-weighting-sampling

A Python implementation of the likelihood weighting approach for Bayesian Network sampling. Fourth assignment for Probabilistic Models for Decisions course @unimib18/19.

Likelihood Weighting

A Python implementation of the likelihood weighting approach for Bayesian Network sampling.

Fourth assignment for Probabilistic Models for Decisions course @ Unimib 18/19.

Prerequisites

• Python 3.0 or greater

Installation

$ git clone https://github.com/GiorgiaAuroraAdorni/likelihood-weighting-sampling
$ cd likelihood-weighting-sampling

Authors

• Giorgia Adorni (806787) - GiorgiaAuroraAdorni

likelihood-weighting-sampling's Issues

Clarification of some codes

Thanks for your coding. I have some difficulties in understanding the following code.

Q1.
What is the purpose of the following code?

for j, el in enumerate(parents_value):
exp = len(parents_value) - j - 1
acc = el * (2**exp)

Q2,
And, for probA_W, I have the difficulty in understanding the meaning of row index
True False
0 0.3 0.7
1 0.1 0.9

For row index 0, is it W = True
For row index 1, is it W = False

Am I right?

Q3
Probability table Traffic Jam, I have the difficulty in understanding the meaning of row index
True False
0 0.10 0.90
1 0.60 0.40
2 0.30 0.70
3 0.50 0.50
4 0.95 0.05
5 0.95 0.05
6 0.95 0.05
7 0.95 0.05

For row index 0, is it H = True, W = True, A = True
For row index 1, is it H = True, W = True, A = False
For row index 2, is it H = True, W = False, A = True
For row index 3, is it H = True, W = False, A = False
For row index 4, is it H = False, W = True, A = True
For row index 5, is it H = False, W = True, A = False
For row index 6, is it H = False, W = False, A = True
For row index 7, is it H = False, W = False, A = False

Am I right?

Again, thanks for your sharing