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Questions tagged [simulation]

Simulation is the imitation of some real thing, state of affairs, or process. The act of simulating something generally entails representing certain key characteristics or behaviours of a selected physical or abstract system.

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Incrementing time in a discrete-event simulation of a supermarket queue

A method has been written that increments time in minutes that simulates how much time it takes to process item in a supermarket queue and if there is an empty queue, skip it and loops around to find ...
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1answer
62 views

Design of a Tic Tac Toe program in Python

Here is a program I wrote to reproduce the known win proportions for random Tic Tac Toe games (X always moving first). It takes about a minute to play the one million random games that will be played ...
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Follow up Implementation on Monty Hall Simulation

I have taken your inputs on my original question and formed a new implementation of the Monty Hall Simulation: Again keep an eye on CleanCode and OOP The Price to be won: ...
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Reproducing the known results for random tic tac toe play using Python

I'm reading "Code Complete" by McConnel and I'm practicing using object oriented programming to "reduce complexity". (By that McConnel means, among other things, that it should be very easy to read ...
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1answer
79 views

Discrete event simulation for production defects

I have one machine, which produces parts. In machine_failure_rate% it produces faulty parts which need to be produced again. Thus, we end up with a simple queuing ...
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332 views

Counting consecutive selections of a given number when sampling integers in a range

This script counts consecutive number strikes of a number that you determine in a number-sequence that you also determine. I would be very pleased if this script can be reviewed in terms of ...
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Pygame simulation of a production line

So my code works as intended, but suffers major performance issues every time I add a new object to the screen. The speed of my objects basically gets cut in half. All you have to do to observe this ...
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333 views

Simulating a two-body collision problem to find digits of Pi

I came across a nice video on 3Blue1Brown's channel that highlights a very indirect way to find the digits in Pi. I'd suggest watching the whole video, but briefly: The setup is as above. A "small" ...
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1answer
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DM::OJ Slot Machines challenge in Python 3

I have written a solution to the Slot Machines challenge on DM::OJ: Martha takes a jar of quarters to the casino with the intention of becoming rich. She plays three machines in turn. Unknown to ...
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1answer
74 views

Langton's Ant simulation

I created a simple program to simulate the Ant's path. The Ant moves north, west, east and south. Each time the Anth moves to an "uncharted" location, I build a Square and give it a color. Each time ...
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1answer
68 views

Very slow frame rate in C++ N-body simulation using Barnes-Hutt and RK4

I am writing the code for my EPQ project and am aiming to produce a graphic showing the collapse of a particle cloud with around 10^5/6 particles. My current code will spawn a specified number of ...
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1answer
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Simulating data generating process correctly

My aim is to simulate the following model by means of a Monte Carlo simulation. I wonder if my R code is correct for generating the data. Could somebody check? The model: $$Y = \sum_{j=1}^{100} (...
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Moderate return-low risk vs high returns-high risk investments

To quantify Buffet's #1 rule of investing, "Don't lose money", I take the assumption that % returns of an investment follow a Normal distribution. Now a high return high risk investment might follow ...
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Chess Simulation

Part of the program I wrote simulates a Chess game choosing random moves for each player until it's a draw or win for either player. It takes 3 seconds to complete 1 simulation and since it trains ...
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2answers
63 views

Simulation of an alien population

Background I've come across a puzzle (Problem 10 from this list of sample interview questions): One day, an alien comes to Earth. Every day, each alien does one of four things, each with equal ...
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1answer
87 views

Filling up a hand with random cards that are not yet drawn - Monte Carlo

I would like to know if there is a more efficient way to speed up below code. This function is meant to fill in a set of poker hand with the remaining cards using Mersenne Twister for a Monte Carlo ...
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2answers
73 views

Parallel processing simulation

Input n number of workers and m jobs to be scheduled, followed by m lines of time ...
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0answers
47 views

Excel VBA animation runs slowly after editing worksheet

My VBA macro displays an animation based on a row-by-row time step simulation in the worksheet. The user enters the desired inputs and the worksheet calculates the evolution of the simulation in a ...
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Designing a configurable Discrete Event Simulation class

A bit of context: I've had a fair share of programming in Java but want to refine my C++ skills with a college task. I've wanted to focus on C++11 and C++14, as they are recent but not latest, and C++...
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The importance of consistency in percentage returns when investing

It is said that Being consistent in percentage annual returns leads to larger amount over time. That is for any given principal, getting 20% successively for 2 years is better than 30% for first ...
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1answer
36 views

Counting results of die rolls

The algorithm bellow is meant to allow a user to roll a die as many times as he would like, then print how many times each side was rolled and how many rolls there were total. ...
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1answer
67 views

NAQ 2018 Problem D Froggie

Successful attempt at the ICPC North America Qualifier 2018 Problem D "Froggie." Any advice and all topical comments on code optimization and performance enhancement is appreciated! Problem Summary ...
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2answers
93 views

Extending Combo from Food in FoodOrder Simulator

This is an assignment and I'm trying to improve upon the design factor. Honestly the task seems very trivial to use inheritance so I kind of did it for the sake of doing it. The problem description ...
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3answers
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Newton-Pepys, common birthdays and other probability simulations in Python 3

I have been learning Probability from Statistics 110 and trying to simulate problems that have an unintuitive answer ...
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1answer
121 views

Yet another vending machine

I recently got a homework assignment from my C++ teacher. The verbatim assignment was this: Write a program that simulates a vending machine. A customer selects and item for purchase and inserts a ...
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2answers
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Discrete Event Simulator

I'm an undergraduate student and I have this assignment on a Discrete Event simulator. Currently I have completed to the end of v1.2 here. Attached also, is an algorithmic overview. I have wrote my ...
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2answers
220 views

Matching socks from a bag of socks

I was reading the book Algortihms to Live By and was inspired by it to take a shot at simulating How to pair socks from a pile? (sans the efficiently part at the moment). ...
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1answer
64 views

Iteratively simulate a parasite population

I'm trying to build a simulation in R to model the effects of different parasite egg laying behaviors on how many offspring the parasite has, given a limited amount of resources. In brief, this ...
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68 views

Classic “100 doors” simulation in Clojure

I read this question about the "100 Doors" puzzle, and thought that it would make for a good quick exercise. I ended up with two implementations. The first is more straightforward and uses a vector ...
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1answer
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Classic Hundred Doors Simulation

I am doing the 100 Doors problem as an exercise to practice user input and loops. I do understand the problem can be solved by outputting every square number up to the maximum number, but it defeats ...
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134 views

Fast Hardy-Weinberg equilibrium simulation

I was very bored over one of my breaks this year, so I built a Hardy-Weinberg equilibrium simulator for two unrelated alleles of the same gene. Hardy-Weinberg equilibrium is when there is no evolution,...
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1answer
59 views

k-armed bandit problem in Python

I implemented k-armed bandit problem in C#, MATLAB and Python. C# and Matlab code run fairly fast (With same settings of T = 2000 and nRun = 1000 the elapsed time is about 6sec). However, the Python ...
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2answers
287 views

Blackjack strategy simulation

I'm very new to python (been coding for about two days) and have created a programme that simulates blackjack games so that I can work out optimal strategy over many iterations. The problem is that ...
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1answer
133 views

Packet process time simulation using queue

Here is my code for the below packet time simulation problem using queue. My code works correctly but it's slow, please help with suggestions to improve run time and other suggestions for performance ...
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2answers
93 views

A game of automated tag

This game has 4 people moving randomly, one unit in one of the four directions (up, down, left, right), with a fifth person as a designated tagger. If this fifth person tags someone, the person is out....
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471 views

Java Conway's Game Game of Life

I have implemented Conway's Game of Life simulation. What can I improve? How could I structure my programme better? All suggestions would be appreciated. World.java: ...
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1answer
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ROW (Race of work) simulation

I wrote a ROW (Race of work) simulation, the idea contains a mathematical bug and, I asked a question about it here. I would also like to make this code more readable and, this is why I am sharing it ...
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1answer
92 views

Galton Board Simulation

This program is written for Windows 7 under MinGW using gcc. I'm seeking recommendations for improving the program's portability. ...
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Make a Deal program - using sets in Python

Mostly because I didn't believe the outcome of the classic game play Make-a-Deal (see https://math.stackexchange.com/questions/608957/monty-hall-problem-extended) I made this little program... and ...
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1answer
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Beginnings of a neuron simulation

I have 2 classes that do extremely similar things. The only differences are that they draw using different colors, and that one draws in the back. The classes ...
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2answers
377 views

Java Langton's Ant simulation

I have implemented a simulation which is called "Langton's Ant" with Java. Here is a short summary of basic rules: A ant is placed in a 2D matrix and looks to north, west, east or south. First, all ...
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1answer
126 views

Simulating coin flips and plotting a histogram

I started playing around recently with F# and I find it quite elegant and succinct language. A common problem I like to solve in every language I start to learn is the coin flip problem, with the ...
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Work environment simulator

This code attempts to solve a suggested challenge by myself a while back on meta, transcribed here for simplicity. Allocate resources efficiently on a work environment The company Code42Review ...
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947 views

Python Conway's Game of life

One of my first serious Python programs, realized Conway's Game of Life in Python. Not sure that get_cell_state and update_table functions are good as they might be. Would be glad to see any ...
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177 views

Java agent-based model

I've been working on an agent-based model as part of my PhD and I've hit a roadblock. I started learning Java by doing this project and I definitely started to run before I could walk. The problem is ...
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1answer
100 views

Rock Climbing Simulation Game

I am a rock climber so I made a rock climbing game. I have two conceptual objects; the climber and the route. I ended up putting them both into a single Climber ...
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2answers
108 views

Simulating surname convergence in a population

I was curious a few weeks ago about how surnames come and go (mostly on the go). I wanted to know how quickly surnames die out, because (in my simplified simulation world) once the last person with a ...
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3answers
432 views

Coding exercise to simulate animal population

(This is all available in a github repo if that's easier: https://github.com/paulnicholsen27/SpeciesSimulator) I am submitting this as a code sample for a possible job, so I'm just looking for any ...
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1answer
121 views

Concise Proof of the Monty Hall Problem in R

This is an attempt at a concise proof of the Monty Hall problem in probability and statistics in R. For those unfamiliar, the scenario is this: There exists a contestant on a game show. This ...
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1answer
148 views

C++ Grid gravity simulation opzimization (Kattis Falling Apples)

I have a solution for the Kattis Falling Apples problem (link). The input is a grid of R rows (up to 50000) by C columns (up to 10). At each timestep, apples (indicated by ...