Adaptive OED

OED for adaptive experiment design. Requires the 20160627-jayelm-adaptive feature branch of jayelm/webppl-oed.

Make sure to build a minified version of webppl.min.js first with grunt webppl, or nothing will work!

To generate a version for browser usage, do:

npm install -g uglifyjs # If not already installed
grunt # Runs the ./concat script

Usage

Specify webppl model as a thunk that, when called, declares all of the webppl infrastructure and models you wish to test.

Feel free to refer to all webppl and webppl-oed functionality in your thunk. AOED uses reflection to obtain the code of your function and pass it into the webppl compiler.

The one requirement of your thunk is that you declare an args object that has exactly the same format as the object you would pass into a traditional OED() call. The libraries does a rudimentary check to make sure this object is defined, or nothing will work.

Once that's done, call AOED to obtain an Adaptive OED object. This object can be parsed in various ways (TODO: how to deal with the object besides CLI), or ran in a wrapper such as runCLI.

var adaptive = require('adaptive-oed');

var infrastructure = function() {
    var model1 = function(...) {
        ...
    };

    var model1 = function(...) {
        ...
    };

    var args = {
        mNameSample: ...,
        mFuncs: ...,
        xSample: ...,
        ySample: ...
    };
};

var aoed = adaptive.AOED(infrastructure);
adaptive.runCLI(aoed);  # Run an AOED "repl"

See the examples directory for more examples.

Examples

A CLI version of adaptive OED with the 20 participants coin model example. The script will suggest an optimal experiment based on the existing prior distribution, then ask for the result of the experiment you suggest (for now assuming that you'll do precisely the experiment suggested). Your response will be JSON-parsed and must exist in the experiment space.

$ node examples/adaptiveCoin.js
loaded webppl-oed [v0.0.1-2a5f596]
loaded webppl [v0.8.1-2a5f596]
Prior:
Marginal({ dist:
   { '"markovGroup"': { val: 'markovGroup', prob: 0.33333333333333337 },
	 '"fairGroup"': { val: 'fairGroup', prob: 0.33333333333333337 },
	 '"biasGroup"': { val: 'biasGroup', prob: 0.33333333333333337 } } })
Suggested experiment:
{ x: [ true, true, true, true ], EIG: 0.7843349496066588 }
prompt: expt:  [19, 1]  # Response must be valid JSON
AIG: 0.4377096216828516
Prior:
Marginal({ dist:
   { '"biasGroup"': { val: 'biasGroup', prob: 0.627560159830183 },
	 '"fairGroup"': { val: 'fairGroup', prob: 0.0000689137851265145 },
	 '"markovGroup"': { val: 'markovGroup', prob: 0.3723709263846904 } } })
Suggested experiment:
{ x: [ true, true, true, true ], EIG: 3.9534302856162418 }
...

Building

First install required node modules:

npm install

Then, to build a minified version of webppl.min.js in node_modules/webppl, run

grunt webppl

Pay close attention to the grunt output: if grunt can't find webppl.min.js, the files created in dist/ will be useless.