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Title	Monty Hall Simulation
ID	1121357698
Created	13 years ago, 1352747490059
Updated	12 years ago, 1385473725007
Code	/******************************************************** * Runs the Monty Hall problem continually, * graphing the results of switching or not switching. ********************************************************/ var graphX = 50; var graphY = 300; var graphWidth = 300; var graphHeight = 200; var barWidth = 100; var barGap = (graphWidth - 2barWidth) / 3; var bar1X = graphX + barGap; var bar2X = graphX + barGap2 + barWidth; // Speed of simulation - don't set to high frameRate(100); var number_of_doors = 3; var wins_if_you_switch = 0; var wins_if_you_dont_switch = 0; var number_of_games = 0; var playGame = function() { number_of_games++; var prize_door = floor(random(0, number_of_doors)); var chosen_door = floor(random(0, number_of_doors)); // Show door which isn't picked and isn't the prize door var possible_shown_doors = []; for (var i=0; i < number_of_doors; i++) { if (i !== prize_door && i !== chosen_door) { possible_shown_doors.push(i); } } var random_num = floor(random(0, possible_shown_doors.length)); var shown_door = possible_shown_doors[random_num]; // If you don't switch then you win if you picked the right door if (chosen_door === prize_door) { wins_if_you_dont_switch++; } // Switch to a door that isn't open var switched_door = null; for (var j=0; j < number_of_doors; j++) { if (j !== shown_door && j !== chosen_door) { switched_door = j; } } if (switched_door === prize_door) { wins_if_you_switch++; } }; textSize(20); var draw = function() { playGame(); background(250, 250, 240); // Bars var scaleY = graphHeight / (1 + number_of_games); noStroke(); fill(75, 75, 125); var y1 = scaleY wins_if_you_switch; var y2 = scaleY * wins_if_you_dont_switch; rect(bar1X, graphY - y1, barWidth, y1); rect(bar2X, graphY - y2, barWidth, y2); // Axes stroke(8, 8, 8); fill(8,8,8); strokeWeight(2); line(graphX, graphY, graphX + graphWidth, graphY); // Labels text("Switch", bar1X+10, graphY+30); text("Don't switch", bar2X, graphY+30); var percent1 = round(1000 * wins_if_you_switch / number_of_games)/10; var percent2 = round(1000 * wins_if_you_dont_switch / number_of_games)/10; text(percent1 + "%", bar1X+20, graphY - y1 - 5); text(percent2 + "%", bar2X+20, graphY - y2 - 5); text("Games won (" + number_of_games + " played)", graphX, graphY - graphHeight); };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIUCxIKU2NyYXRjaHBhZBiCn9qWBAw
Votes	169
Spin-Offs	12
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	null
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	Peter Collingridge
Author Name	peterwcollingridge
Author ID	kaid_1128810778687926889052316
Author Profile Access	COACH

Archive Data

Added	10 months ago, 1739279859453
Updated	10 months ago, 1739279859453
Source Deleted	unknown