Questions tagged [coin-flipping]
Coin flipping is the process of programmatically simulating a coin flip, that is randomly picking a choice among two possibilities.
coin-flipping
141
questions
36
votes
7
answers
53k
views
How do I simulate flip of biased coin?
In unbiased coin flip H or T occurs 50% of times.
But I want to simulate coin which gives H with probability 'p' and T with probability '(1-p)'.
something like this:
def flip(p):
'''this ...
- 36.3k
7
votes
11
answers
83k
views
Python code for the coin toss issues
I've been writing a program in python that simulates 100 coin tosses and gives the total number of tosses. The problem is that I also want to print the total number of heads and tails.
Here's my code:...
- 163
7
votes
3
answers
1k
views
Coin flip simulation never exceeding a streak of 15 heads
I was working on a simulation of the St Petersburg Paradox when I realized my coin-flipping code never recorded any streaks of greater than 15 heads in a row. I ran the simulation 100,000,000 times, ...
- 97
4
votes
4
answers
2k
views
Count number of alternations in a coin flip sequence
I have a sequence of ones and zeros and I would like to count the number of alternations, e.g:
x <- rbinom(10, 1, 1/2)
> x
[1] 0 0 1 1 1 1 1 0 1 0
Thus I would like to count (in R) how many ...
- 829
4
votes
3
answers
2k
views
Simulate coin toss for one week?
This is not homework. I am interested in setting up a simulation of a coin toss in R. I would like to run the simulation for a week. Is there a function in R that will allow me to start and stop the ...
- 829
4
votes
2
answers
5k
views
Coin flip program
I tried making a program that flips a coin(shows image of heads first and later shows image of tails) and I encountered problems trying to have the image of the coin viewed when I ran the problem; ...
- 109
4
votes
1
answer
2k
views
3D Coin Flipping Animation on SKSpriteNode
I'm currently developing a game using Swift 3 and SpriteKit. I have a coin that falls during a game that the user can collect. Right now, it falls and doesn't have any rotation or anything. I want to ...
- 1,664
3
votes
4
answers
15k
views
Flip a coin problem
I have been playing around and wrote this little piece of code. I am trying to flip a coin defined number of times and then count how many tails and heads I am getting. So here it is:
private void ...
- 6,420
3
votes
11
answers
20k
views
Automate the boring stuff - Coin flip streaks
I know there's tons of questions about it by now, even for the same problem, but I think I tried a bit of a different approach.
The task is to to 10.000 samples of 100 flips each and then compute ...
- 61
3
votes
4
answers
7k
views
Tossing a fair coin for 100 times and count the number of heads. Repeat this simulation 10**5 times
Write a program to simulate tossing a fair coin for 100 times and count the number of heads. Repeat this simulation 10**5 times to obtain a distribution of the head count.
I wrote below code to count ...
3
votes
3
answers
724
views
Random Number Generator / Coin Flip / A-B Generator - Run Until X in a Row in R
I am trying to generate random results, such as from a coin flip. I'd like to run this A/B or heads/tails generator until I get x of the same result consecutively.
I found this code online for a ...
3
votes
3
answers
4k
views
Nested loops with C++ coin toss
I have to write a program that runs a loop for a coin toss. I am supported to enter a number into the console and have it run a loop of the coin toss for that many times. I need to use nested loops. I ...
- 397
3
votes
3
answers
5k
views
Coin Flip Simulation
I just started to learn Python and am trying to code the following question:
Coin Flip Simulation- Write some code that simulates flipping a single coin however many times the user decides. The code ...
- 53
2
votes
2
answers
1k
views
How to program an unfair or biased coin flip in Ruby?
I need to make a coin flip that obeys a certain probability of outcome. For example, a coin flip with a 67% chance of coming out Heads, 83% chance of coming out Tails, etc.
I managed to get the ...
- 1,050
2
votes
1
answer
564
views
Generating random uniform random numbers from coin flip algorithm tends to generate more 0s than expected
I am trying to generate random numbers in the range from 0 to 99 using a function rcoin that returns 0 or 1 with equal probability. I have written the following code that converts a binary number ...
2
votes
1
answer
951
views
coin flip experiment in C++ using std::rand() giving incorrect result
I'm trying to count the number of occurrences of the string HHHHHHTTTTTT in 1 million flips. For the coin flip, I'm using a simple std::rand() % 2. The code below. Mathematically, the expected answer ...
- 2,771
2
votes
1
answer
167
views
Simulating 10,000 Coinflips in Python Very Slow
I am writing a simulation that creates 10,000 periods of 25 sets, with each set consisting of 48 coin tosses. Something in this code is making it run very slowly. It has been running for at least 20 ...
- 921
2
votes
1
answer
283
views
Comparing multiple coin flip experiments. 1 Experiment = 100 Flips. Trying to simulate 10 experiments
import random as rd
n = 0
ListOfStreaks = []
ListOfResults = []
while n != 10:
numberOfStreaks = 0
for i in range(100):
Flip = rd.randint(0,1)
ListOfResults.append(Flip)
...
- 21
2
votes
1
answer
929
views
php loop flip coin until 2 heads, then stop
I'm new to php and am trying to write a loop that will flip a coin until exactly two heads have been flipped and then stop.
So far I've written a function for coin flipping:
function cointoss () {
...
- 35
2
votes
2
answers
359
views
Coin Flip Game function
I am trying to create a function in python where a player starts with a certain amount and then given a certain stake and number of flips it will give the ending amount after the flips
I am a ...
- 33
2
votes
2
answers
188
views
Dealing with normal (Gaussian) distribution
I basically stucked on rather simple problem:
Toss N coins and discover, how many of them land heads
Solution performance must not depend on N, so we can't just call Math.random() < 0.5 N times....
- 236
2
votes
1
answer
1k
views
How do I write a function that prints counts of values in an array, taking the array as a parameter?
Starting with the below program that creates an array of coin flips, I have to add a function that prints out the total number of heads and total number of tails flipped. The function must take the ...
- 35
2
votes
1
answer
3k
views
2 Player Coin Flipping
I'm trying to create a Java program that flips two coins to see who wins the coin flip. It prompts the user for a number of coin flips. If the first player has heads and the second player has tails, ...
- 31
2
votes
0
answers
235
views
Unbiase coin toss using the C++11 random library
I have a program that needs to generate very many 0/1 random values. Because this is needed many times and in different part of the code, I wish to have a time efficient and easy to use random ...
- 284
1
vote
9
answers
5k
views
Do you have a better idea to simulate coin flip?
Right now i have
return 'Heads' if Math.random() < 0.5
Is there a better way to do this?
Thanks
edit: please ignore the return value and "better" means exact 50-50 probability.
- 52.8k
1
vote
3
answers
2k
views
Java Coin Flip Suggestions
I'm working on a coin flip assignment and I have the majority of it functioning properly (albeit in a less elegant fashion compared to the code I see on here).
I'm trying to find a way to tell the ...
- 671
1
vote
2
answers
265
views
Implementing a bias in coin toss simulation
I want to simulate a biased coin being flipped 2048 times and record the results from each attempt, along with the total count of each coin. My current code is fully functional and is able to simulate ...
1
vote
2
answers
416
views
Function to output probability in PHP
I'm trying to find a function that takes a number and outputs the expected results as follows:
if input=1
then output should be Array{'0','1'}
if input=2
then output should be Array{'00','01','10','...
- 5,688
1
vote
3
answers
19k
views
How flipping a coin and display tails and heads counting?
I am very beginner on Java, still getting passion about.
I have been given this exercise: "Write a simulator program that flips a coin: One thousand times then prints out how many time you get tails ...
- 13
1
vote
2
answers
2k
views
convert an unfair coin into a fair coin in Python 2.7
Using Python 2.7. Suppose I have an unfair coin and I want to turn it into a fair coin using the following way,
Probability of generating head is equal for unfair coin;
Flip unfair coin and only ...
- 9,979
1
vote
2
answers
4k
views
C++ Calling function inside another function
In my C++ class we've been given an assignment to make a coin toss program that has the random number generator in one function and it is called into another function that runs it twelve(12) times.
...
- 17
1
vote
3
answers
3k
views
How to return all combinations of N coin flips using recursion?
Request:
Using JavaScript, write a function that takes an integer. The integer represents the number of times a coin is flipped. Using recursive strategies only, return an array containing all ...
- 13
1
vote
2
answers
331
views
These Directions Are Not Clear To Me
I have to make a program that uses two files called coin. One file named coin and the other named coin tester. The directions in the book are confusing to me, but I still tried to do the assignment.
...
- 11
1
vote
2
answers
202
views
Generating Coin flips using purrr
Now I'm learning how to use purrr package in r, and thinking about how to generate 5 samples of each 1, 2, ..., 99, 100 coin flips.
My image is to create a list, that should look like..
[[1]]
[[1]]
[...
- 21
1
vote
1
answer
616
views
Coin Toss Plot similar to Feller
From Feller (1950) An Introduction to Probability Theory:
A path of length n can be interpreted as the record of an ideal experiment consisting of n successive tosses of a coin. If +1 stands for ...
- 829
1
vote
2
answers
474
views
Create a function in R for simulating a coin flip game
In a coin flip game, you flip a fair coin until the difference between the number of heads and number of tails is 3. You are paid $8 at the end, but you have to pay $1 for each flip of the coins. Use ...
user14428298
1
vote
1
answer
3k
views
Python coin flip with functions
I need to create a python program that will use various functions to simulate flipping a coin 100 times and finding the largest streak of "H"'s out of 10,000 tries. I am stuck on how to ...
1
vote
2
answers
111
views
Coin tossing simulation unexpected probabilities
This is a script I wrote to simulate a coin toss game that ends in a given fixed sequence of outcomes (tosses are either ones or zeroes). This fixed sequence characterizes the game. For example, ...
- 43
1
vote
1
answer
1k
views
Generate a random number using coin flips while guarenteeing termination
The usual method to generate a uniform random number 0..n using coin flips is to build a rng for the smallest power of two greater than n in the obvious way, then whenever this algorithm generates a ...
- 8,574
1
vote
1
answer
106
views
Question About a Probability Model Using C++
I am trying to solve a probability question theoretically and then modeling it on C++ but my code outputs a different probability from the theoretical one.
Question:
A balanced coin is tossed three ...
1
vote
1
answer
65
views
How to find the stability of a series of binary sequence
I am currently working on a project where I need to find the stability of multiple binary sequences of same length.
samples:
[1,1,1,1,1,1] and [0,0,0,0,0,0] are stable
[1,0,0,1,1,0] is comparatively ...
- 89
1
vote
1
answer
193
views
Generate data from a coin flipping experiment
I have a coin and the coin has memory. i.e. the last flip impacts the probability of heads on this flip. How do I write code to generate data from this process? Specifically, from this process, I want ...
- 2,042
1
vote
1
answer
136
views
Interpretation of the coin toss code in C
During classes the teacher presented the C code for simulation of the coin toss. I know that there have been answered many questions about this topic, however, none of them relates strictly to my ...
- 43
1
vote
1
answer
327
views
How does modulo work when simulating a coin toss in c++?
#include <iostream>
#include <stdlib.h>
#include <ctime>
int main() {
// Create a number that's 0 or 1
srand (time(NULL));
int coin = rand() % 3;
// If number is ...
- 71
1
vote
1
answer
161
views
Displaying multiple images via setInterval very slow in browsers
I'm trying to simulate a coin flip with javascript. It keeps changing images with 4 positions, creating an impression of flipping for 5 seconds and then sets the source to either the "head" image or "...
- 117
1
vote
1
answer
202
views
Iteration performance
I made a function to evaluate the following problem experimentally, taken from a A Primer for the Mathematics of Financial Engineering.
Problem: Let X be the number of times you must flip a fair ...
- 1,791
1
vote
3
answers
2k
views
python - infinite coin flip that stops when number of heads = number of tails
I'm new to python and I'm trying to create a coinflip loop which will keep flipping and counting the number of flips until the number of heads = the number of tails, where it will stop and print the ...
- 13
1
vote
1
answer
221
views
Code to count times to get all heads or all tails is returning only times to get heads
I am pretty happy to say I think I have my first coin flip problem running. I am counting how many times it takes to get all heads or all tails in a trial of 7 flips. In theory it should take around ...
- 99
1
vote
0
answers
47
views
Modelling three biased coins from generated data
Here is an experiment I ran to better understand pymc3. I have three biased coins and I perform the below experiment:
1. Toss Coin1. If head choose Coin2 else choose Coin3
2. Randomly choose a number ...
1
vote
1
answer
669
views
Compute the posterior probability given a Bernoulli distributed likelihood
In a coin flip, we would like to compute p(theta|Data), where theta is the underlying parameter.
The prior follows a beta distribution with parameters a and b.
The likelihood follows a Bernoulli ...
- 65