How to generate random numbers biased towards one value in a range?

Question

Say, if I wanted to generate an unbiased random number between min and max, I\'d do:

var rand = function(min, max) {
    return Mat         


        

Answer 1

Fun: use the image as the density function. Sample random pixels until you get a black one, then take the x co-ordinate.

Code:

getPixels = require("get-pixels"); // npm install get-pixels

getPixels("distribution.png", function(err, pixels) {
  var height, r, s, width, x, y;
  if (err) {
    return;
  }
  width = pixels.shape[0];
  height = pixels.shape[1];
  while (pixels.get(x, y, 0) !== 0) {
    r = Math.random();
    s = Math.random();
    x = Math.floor(r * width);
    y = Math.floor(s * height);
  }
  return console.log(r);
});

Example output:

0.7892316638026386
0.8595335511490703
0.5459279934875667
0.9044852438382804
0.35129814594984055
0.5352215224411339
0.8271261665504426
0.4871773284394294
0.8202084102667868
0.39301465335302055

Scale to taste.