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# Project 4: Ghostbusters CS 6300 solved

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## Description

Artificial Intelligence
In this project, you will design Pacman agents that use sensors to locate and eat invisible ghosts.
You’ll advance from locating single, stationary ghosts to hunting packs of multiple moving ghosts
with ruthless efficiency.
This can be run with the command:
The code for this project consists of several Python files, some of which you will need to read and
understand in order to complete the assignment, and some of which you can ignore. Download
tracking.zip from here http://ai.berkeley.edu/tracking.html which will contain all the code
and supporting files.
1 Files to edit
For this project you will need to edit the following files:
1. bustersAgents.py : Agents for playing the Ghostbusters variant of Pacman.
2. inference.py : Code for tracking ghosts over time using their sounds.
2 Ghostbusters and BNs(100 pts)
Your primary task in this project is to implement inference to track the ghosts. For the keyboard
based game above, a crude form of inference was implemented for you by default: all squares
in which a ghost could possibly be are shaded by the color of the ghost. Naturally, we want a
better estimate of the ghost’s position. Fortunately, Bayes’ Nets provide us with powerful tools
for making the most of the information we have. Throughout the rest of this project, you will
implement algorithms for performing both exact and approximate inference using Bayes’ Nets.
For all the problem titles described below, please refer to the link http://ai.berkeley.edu/
tracking.html for the problem description and what is expected of each problem. As always
autograder has different test cases against which you can run your program to check the correctness.
2.1 Exact Inference Observation(12 pts)
1. (12 pts) Code Implementation
1
2.2 Exact Inference with Time Elapse(16 pts)
1. (16 pts) Code Implementation
2.3 Exact Inference Full Test (12 pts)
1. (12 pts) Code Implementation
2.4 Approximate Inference Observation (12 pts)
1. (12 pts) Code Implementation
2.5 Approximate Inference with Time Elapse(16 pts)
1. (16 pts) Code Implementation
2.6 Joint Particle Filter Observation(16 pts)
1. (16 pts) Code Implementation
2.7 Joint Particle Filter with Elapse Time(16 pts)
1. (16 pts) Code Implementation
3 Self Analysis
1. What was the hardest part of the assignment for you?
2. What was the easiest part of the assignment for you?
3. What problem(s) helped further your understanding of the course material?
4. Did you feel any problems were tedious and not helpful to your understanding of the
material?
4 Evaluation
provided functions or classes within the code, or you will wreak havoc on the autograder. If your
code passes all the test cases in the autograder you would receive full points for the implementation.
2
However even if your code does not necessarily pass all the test cases, we would evaluate your code
and then award you partial points accordingly. In such cases it would be even more beneficial if
you could give a short description of what you tried and where you had failed and that would help
us in giving you better points.
5 Submission Instructions
• For the final submission you would be turning in a single zipped folder which should contain:
– Folder having all the python files.(tracking folder in this case)
– PDF document containing your responses to the questions in Section 3.
• For those of you who are doing it in teams, it is enough that one of the team members makes
• Please ensure all the submissions are done through canvas. Please do not email the instructor
or the TA with your submission. Submissions made via email would not be considered for
• Naming:Your final upload should be named in the format < uid >-Proj4.zip where < uid >
is your Utah uid. Ex: u0006300-Proj4.zip
• For this project you should first unzip tracking.zip and then will fill in portions of code in the
necessary files mentioned in Section 1. Do not delete any of the files or change the names of
any of those files in the project directory.
• Written Answers: Place all written answers to questions in a single PDF document. This
should be clearly named in the format < uid >-Proj4-answers.pdf, where < uid > is your