Examples of TRP

cc.mallet.grmm.inference.TRP
Implementation of Wainwright's TRP schedule for loopy BP in general graphical models. @author Charles Sutton @version $Id: TRP.java,v 1.1 2007/10/22 21:37:49 mccallum Exp $

Examples of cc.mallet.grmm.inference.TRP

  }


  public void testEarlyStopping ()
  {
    FactorGraph grid = RandomGraphs.randomAttractiveGrid (5, 0.5, new Random (2413421));
    TRP trp = new TRP (new TRP.IterationTerminator (1));
    trp.setRandomSeed (14312341);


    trp.computeMarginals (grid);


    boolean oneIsDifferent = false;


    // check no exceptions thrown when asking for all marginals,
    //  and check that at least one factors' belief has changed
    //  from the choice at zero iterations.
    for (Iterator it = grid.factorsIterator (); it.hasNext();) {
      Factor f = (Factor) it.next ();
      Factor marg = trp.lookupMarginal (f.varSet ());// test no exception thrown
      if (!marg.almostEquals (f.duplicate ().normalize ())) {
        oneIsDifferent = true;
      }
    }

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Examples of cc.mallet.grmm.inference.TRP

  public void testBadVariable ()
  {
    FactorGraph fg = createBoltzmannChain (5);
    Assignment assn = fg.sampleContinuousVars (new Randoms (23423));
    FactorGraph sliced = (FactorGraph) fg.slice (assn);
    Inferencer bp = new TRP ();
    bp.computeMarginals (sliced);


    try {
      bp.lookupMarginal (new Variable (2));
      fail ("Expected exception");
    } catch (IllegalArgumentException e) {
      // expected
      System.out.println ("OK: As expected, got exception "+e);
    }

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Examples of cc.mallet.grmm.inference.TRP

  public void testBadVariable ()
  {
    FactorGraph fg = createBoltzmannChain (5);
    Assignment assn = fg.sampleContinuousVars (new Randoms (23423));
    FactorGraph sliced = (FactorGraph) fg.slice (assn);
    Inferencer bp = new TRP ();
    bp.computeMarginals (sliced);


    try {
      bp.lookupMarginal (new Variable (2));
      fail ("Expected exception");
    } catch (IllegalArgumentException e) {
      // expected
      System.out.println ("OK: As expected, got exception "+e);
    }

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