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fake age range numbers via gaussian distribution
var gaussian = require('gaussian');
// mean is the center of the distritubion
var mean = 34.5;
var variance = 300;
var distribution = gaussian(mean, variance);
// number of samples
var x = 1000;
var results = [];
// bins
var bins = ([{
start: 16,
stop: 18
}, {
start: 18,
stop: 25
}, {
start: 25,
stop: 35
}, {
start: 35,
stop: 45
}, {
start: 45,
stop: 55
}, {
start: 55,
stop: 65
}, {
start: 65,
stop: 99
}]).map(bin => {
bin.results = [];
return bin;
});
// take a sample
for (let i = 0; i <= x; i++) {
results.push(distribution.ppf(Math.random()));
}
// sort samples to make bin-ing faster
results = results.sort((a,b) => a > b ? 1 : -1);
// put results in bins
var bindex = 0;
var bin = bins[0];
results.forEach(function(result) {
if (result < 0) return;
// find the appropriate bin
while (result > bin.stop && bindex <= bins.length) {
bindex++;
bin = bins[bindex];
}
if (result < bin.start) return;
bin.results.push(result);
});
bins.forEach((bin, i) => {
var int = ~~(bin.results.length / 10);
console.log(bin.start, bin.stop, new Array(int).fill('x').join(''));
});
/*
example results
16 18 'xx'
18 25 'xxxxxxxxxxx'
25 35 'xxxxxxxxxxxxxxxxxxxxxxx'
35 45 'xxxxxxxxxxxxxxxxxxxxx'
45 55 'xxxxxxxxxxxxxxx'
55 65 'xxxxxxx'
65 99 'xxx'
*/
{
"name": "fake-age-bins",
"version": "1.0.0",
"description": "",
"main": "fake-age-bins.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"dependencies": {
"gaussian": "^1.1.0"
}
}
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