public void testRecenter () { Variable var = new Variable (4); double[] vals = new double[]{ 2.0, 4.0, 6.0, 8.0 }; LogTableFactor ltbl1 = LogTableFactor.makeFromValues (var, vals); ltbl1.recenter (); double[] expected = new double[] { Math.log (0.25), Math.log(0.5), Math.log (0.75), 0 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue ("Error: expected "+ans.dumpToString ()+"but was "+ltbl1.dumpToString (), ans.almostEquals (ltbl1)); }
public void testRecenter () { Variable var = new Variable (4); double[] vals = new double[]{ 2.0, 4.0, 6.0, 8.0 }; LogTableFactor ltbl1 = LogTableFactor.makeFromValues (var, vals); ltbl1.recenter (); double[] expected = new double[] { Math.log (0.25), Math.log(0.5), Math.log (0.75), 0 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue ("Error: expected "+ans.dumpToString ()+"but was "+ltbl1.dumpToString (), ans.almostEquals (ltbl1)); }
public void testPlusEquals () { Variable var = new Variable (4); // log 0, log 1, log 2, log 3 double[] vals = new double[] { Double.NEGATIVE_INFINITY, 0, 0.6931471805599453, 1.0986122886681098 }; LogTableFactor factor = LogTableFactor.makeFromLogValues (var, vals); factor.plusEquals (0.1); // log 0.1, log 1.1, log 2.1, log 3.1 double[] expected = new double[] { -2.3025850929940455, 0.09531017980432493, 0.7419373447293773, 1.1314021114911006 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue ("Error: expected "+ans.dumpToString ()+" but was "+factor.dumpToString (), factor.almostEquals (ans)); }
public void testPlusEquals () { Variable var = new Variable (4); // log 0, log 1, log 2, log 3 double[] vals = new double[] { Double.NEGATIVE_INFINITY, 0, 0.6931471805599453, 1.0986122886681098 }; LogTableFactor factor = LogTableFactor.makeFromLogValues (var, vals); factor.plusEquals (0.1); // log 0.1, log 1.1, log 2.1, log 3.1 double[] expected = new double[] { -2.3025850929940455, 0.09531017980432493, 0.7419373447293773, 1.1314021114911006 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue ("Error: expected "+ans.dumpToString ()+" but was "+factor.dumpToString (), factor.almostEquals (ans)); }
public Factor normalize () { double sum = logspaceOneNorm (); if (sum < -500) System.err.println ("Attempt to normalize all-0 factor "+this.dumpToString ()); for (int i = 0; i < probs.numLocations (); i++) { double val = probs.valueAtLocation (i); probs.setValueAtLocation (i, val - sum); } return this; }
public Factor normalize () { double sum = logspaceOneNorm (); if (sum < -500) System.err.println ("Attempt to normalize all-0 factor "+this.dumpToString ()); for (int i = 0; i < probs.numLocations (); i++) { double val = probs.valueAtLocation (i); probs.setValueAtLocation (i, val - sum); } return this; }
public Factor normalize () { double sum = logspaceOneNorm (); if (sum < -500) System.err.println ("Attempt to normalize all-0 factor "+this.dumpToString ()); for (int i = 0; i < probs.numLocations (); i++) { double val = probs.valueAtLocation (i); probs.setValueAtLocation (i, val - sum); } return this; }
public void testRecenter2 () { Variable var = new Variable (4); double[] vals = new double[]{ 0, 1.4, 1.4, 0 }; LogTableFactor ltbl1 = LogTableFactor.makeFromLogValues (var, vals); ltbl1.recenter (); double[] expected = new double[]{ -1.4, 0, 0, -1.4 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue (!ltbl1.isNaN ()); assertTrue ("Error: expected "+ans.dumpToString ()+"but was "+ltbl1.dumpToString (), ans.almostEquals (ltbl1)); }
public void testRecenter2 () { Variable var = new Variable (4); double[] vals = new double[]{ 0, 1.4, 1.4, 0 }; LogTableFactor ltbl1 = LogTableFactor.makeFromLogValues (var, vals); ltbl1.recenter (); double[] expected = new double[]{ -1.4, 0, 0, -1.4 }; LogTableFactor ans = LogTableFactor.makeFromLogValues (var, expected); assertTrue (!ltbl1.isNaN ()); assertTrue ("Error: expected "+ans.dumpToString ()+"but was "+ltbl1.dumpToString (), ans.almostEquals (ltbl1)); }
public void testLogMultiVarSlice () { double[] vals = { 0.0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; Variable v1 = new Variable (2); Variable v2 = new Variable (2); Variable v3 = new Variable (2); Variable v4 = new Variable (2); Variable[] vars = new Variable[]{v1, v2, v3, v4}; Factor ptl = LogTableFactor.makeFromValues (vars, vals); System.out.println (ptl.dumpToString ()); Assignment assn = new Assignment (v4, 0); LogTableFactor sliced = (LogTableFactor) ptl.slice (assn); LogTableFactor expected = LogTableFactor.makeFromValues (new Variable[] { v1,v2,v3 }, new double[] { 0, 2, 4, 6, 8, 10, 12, 14 }); assertTrue ("Test failed. Expected: "+expected.dumpToString ()+"\nActual: "+sliced.dumpToString (), expected.almostEquals (sliced)); }
public void testLogMultiVarSlice () { double[] vals = { 0.0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; Variable v1 = new Variable (2); Variable v2 = new Variable (2); Variable v3 = new Variable (2); Variable v4 = new Variable (2); Variable[] vars = new Variable[]{v1, v2, v3, v4}; Factor ptl = LogTableFactor.makeFromValues (vars, vals); System.out.println (ptl.dumpToString ()); Assignment assn = new Assignment (v4, 0); LogTableFactor sliced = (LogTableFactor) ptl.slice (assn); LogTableFactor expected = LogTableFactor.makeFromValues (new Variable[] { v1,v2,v3 }, new double[] { 0, 2, 4, 6, 8, 10, 12, 14 }); assertTrue ("Test failed. Expected: "+expected.dumpToString ()+"\nActual: "+sliced.dumpToString (), expected.almostEquals (sliced)); }