simulate.js

for (var i = 0; i < 100000; i++) {
    match = {"$match":
        {
            "OffenseTeam": "DEN",
            "$or": [{"PlayType": "PASS"}, {"PlayType": "RUSH"}],
            "IsNoPlay": 0
        }
    }
    sample = {"$sample":
        {
            "size": 60
        }
    }
    proj = {"$project":
        {
            "team": "$OffenseTeam",
            "yards": "$Yards",
            "turnovers": {"$sum": ["$IsInterception", "$IsFumble"]}
        }
    }
    group = {"$group":
        {
            "_id": "$team",
            "yards": {"$sum": "$yards"},
            "turnovers": {"$sum": "$turnovers"}
        }
    }

    res = db.pbp_2015.aggregate([match, sample, proj, group])
    simulation_doc = res['result'][0]
    simulation_doc["team"] = simulation_doc["_id"]
    simulation_doc["i"] = i
    delete simulation_doc["_id"]
    db.pbp_2015_simulations.insert(simulation_doc)

    match["$match"]["OffenseTeam"] = "CAR"
    res = db.pbp_2015.aggregate([match, sample, proj, group])
    simulation_doc = res['result'][0]
    simulation_doc["team"] = simulation_doc["_id"]
    simulation_doc["i"] = i
    delete simulation_doc["_id"]
    db.pbp_2015_simulations.insert(simulation_doc)
}