usptact

// Remove each element in array ys from array xs
var remove = function(xs, ys) {
  return _.without.apply(null, [xs].concat(ys));
};

var doors = [1, 2, 3];

// Monty chooses a door that is neither Alice's door
// nor the prize door
var monty = function(aliceDoor, prizeDoor) {

usptact

// 4 dice: 4, 6, 8 and 12 sides
// each dice is perfect
var dice = [
	Categorical(
		{
			ps: [1/4, 1/4, 1/4, 1/4],
			vs: [0, 1, 2, 3]
		}
	),
	Categorical(

usptact

var person = function() {
        var is_female = sample(Bernoulli({p: 0.51}))
        if (is_female == false) {
                return {hgt: sample(Gaussian({mu: 178.0, sigma: 7.7})), is_female: is_female}
        } else {
                return {hgt: sample(Gaussian({mu: 163.0, sigma: 7.3})), is_female: is_female}
        }
}

var is_taller = function(h1, h2) {

usptact

//
// Game of Ur
//

var roll = function() {
	return flip() + flip() + flip() + flip();
}

var game = function() {
	var n = sample(RandomInteger({n: 20}));

usptact

//
// Zoo: Infer prevalence of 3 animals after a zoo visit
//
// Observed: 3 lions, 2 tigers and 1 bear
//
// Questions:
// - Prevalence of each species
// - Probability of seeing a bear next time
//

usptact

using System;
using Microsoft.ML.Probabilistic.Models;

namespace twodice
{
    class Program
    {
        static void Main(string[] args)
        {
            Variable<int> six = Variable.DiscreteUniform(6);

usptact

Note: these instructions are for pre-Sierra MacOS. Sierra and newer users see https://gist.github.com/gravitylow/fb595186ce6068537a6e9da6d8b5b96d by @gravitylow.

If you are getting this in gdb on OSX while trying to run a program:

Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

usptact

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "HelloServlet", urlPatterns = {"hello"}, loadOnStartup = 1) 
public class HelloServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response)

usptact

// Two balls in the bag:
// (1) fifty/fifty red (true) or green (false)
// (2) 100% red
//
// Process:
// - pull out the first ball and observe it is red
// - Question: what is the probability the remaining ball is red too?

var model = function() {
  var b1 = flip(0.5)

usptact

using Microsoft.ML.Probabilistic.Math;
using Vector = Microsoft.ML.Probabilistic.Math.Vector;

class Program
{
    static void Main(string[] args)
    {
        Vector x = Vector.FromArray(new double[] { 0, 1 });
        //Vector x = new Vector();
        //Vector mean = new Vector(new double[] { 0.1, 1.1 });