- Timestamp:
- 04/10/15 16:12:08 (10 years ago)
- Location:
- branches/HeuristicLab.Problems.GrammaticalOptimization-gkr
- Files:
-
- 5 edited
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branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Algorithms.GrammaticalOptimization/SequentialDecisionPolicies/GenericPolicy.cs
r12295 r12298 48 48 foreach (var afterState in afterStates) { 49 49 if (!Done(afterState)) { 50 if (GetTries(afterState) == 0) 51 activeAfterStates[idx] = double.PositiveInfinity; 52 else 53 activeAfterStates[idx] = GetValue(afterState); 50 activeAfterStates[idx] = CalculateValue(afterState); 54 51 actionIndexMap[idx] = originalIdx; 55 52 idx++; … … 58 55 } 59 56 57 60 58 //var eps = Math.Max(500.0 / (GetTries(curState) + 1), 0.01); 61 59 //var eps = 10.0 / Math.Sqrt(GetTries(curState) + 1); 62 var eps = 0. 2;60 var eps = 0.01; 63 61 selectedStateIdx = actionIndexMap[SelectEpsGreedy(random, activeAfterStates.Take(idx), eps)]; 64 62 63 UpdateValue(curState, afterStates); 64 65 65 return true; 66 66 } 67 68 private double CalculateValue(string chain) { 69 var features = problem.GetFeatures(chain); 70 var sum = 0.0; 71 foreach (var f in features) { 72 // if (GetTries(f.Id) == 0) 73 // sum = 0.0; 74 // else 75 sum += GetValue(f.Id) * f.Value; 76 } 77 return sum; 78 } 79 80 private void UpdateValue(string curChain, IEnumerable<string> alternatives) { 81 const double gamma = 1; 82 const double alpha = 0.01; 83 var maxNextQ = alternatives 84 .Select(CalculateValue).Max(); 85 86 var delta = gamma * maxNextQ - CalculateValue(curChain); 87 88 foreach (var f in problem.GetFeatures(curChain)) { 89 90 Q[f.Id] = GetValue(f.Id) + alpha * delta * f.Value; 91 } 92 } 93 94 private void UpdateLastValue(string terminalChain, double reward) { 95 const double alpha = 0.01; 96 var delta = reward - CalculateValue(terminalChain); 97 foreach (var f in problem.GetFeatures(terminalChain)) { 98 Q[f.Id] = GetValue(f.Id) + alpha * delta * f.Value; 99 } 100 } 101 67 102 68 103 private int SelectBoltzmann(Random random, IEnumerable<double> qs, double beta = 10) { … … 121 156 122 157 public void UpdateReward(IEnumerable<string> chainTrajectory, double reward) { 123 const double gamma = 0.95; 124 const double minAlpha = 0.01; 125 var reverseChains = chainTrajectory.Reverse(); 126 var terminalChain = reverseChains.First(); 127 128 var terminalState = CalcState(terminalChain); 129 T[terminalState] = GetTries(terminalChain) + 1; 130 double alpha = Math.Max(1.0 / GetTries(terminalChain), minAlpha); 131 Q[terminalState] = (1 - alpha) * GetValue(terminalChain) + alpha * reward; 132 133 foreach (var chain in reverseChains.Skip(1)) { 134 135 var maxNextQ = followStates[chain] 136 //.Where(s=>!Done(s)) 137 .Select(GetValue).Max(); 138 T[CalcState(chain)] = GetTries(chain) + 1; 139 140 alpha = Math.Max(1.0 / GetTries(chain), minAlpha); 141 Q[CalcState(chain)] = (1 - alpha) * GetValue(chain) + gamma * alpha * maxNextQ; // direct contribution is zero 142 } 158 // // only updates the last chain because we already update values after each step 159 // var reverseChains = chainTrajectory.Reverse(); 160 // var terminalChain = reverseChains.First(); 161 // 162 // UpdateValue(terminalChain, reward); 163 // 164 // foreach (var chain in reverseChains.Skip(1)) { 165 // 166 // var maxNextQ = followStates[chain] 167 // //.Where(s=>!Done(s)) 168 // .Select(GetValue).Max(); 169 // 170 // UpdateValue(chain, maxNextQ); 171 // } 172 var terminalChain = chainTrajectory.Last(); 173 UpdateLastValue(terminalChain, reward); 143 174 if (problem.Grammar.IsTerminal(terminalChain)) MarkAsDone(terminalChain); 144 175 } 176 145 177 146 178 public void Reset() { 147 179 Q.Clear(); 180 T.Clear(); 148 181 done.Clear(); 149 182 followStates.Clear(); … … 160 193 161 194 162 public int GetTries(string state) { 163 var s = CalcState(state); 164 if (T.ContainsKey(s)) return T[s]; 195 public int GetTries(string fId) { 196 if (T.ContainsKey(fId)) return T[fId]; 165 197 else return 0; 166 198 } 167 199 168 public double GetValue(string chain) {169 var s = CalcState(chain);170 if (Q.ContainsKey( s)) return Q[s];200 public double GetValue(string fId) { 201 // var s = CalcState(chain); 202 if (Q.ContainsKey(fId)) return Q[fId]; 171 203 else return 0.0; // TODO: check alternatives 172 204 } 173 205 174 private string CalcState(string chain) {175 var f = problem.GetFeatures(chain);176 // this policy only works for problems that return exactly one feature (the 'state')177 if (f.Skip(1).Any()) throw new ArgumentException();178 return f.First().Id;179 }206 // private string CalcState(string chain) { 207 // var f = problem.GetFeatures(chain); 208 // // this policy only works for problems that return exactly one feature (the 'state') 209 // if (f.Skip(1).Any()) throw new ArgumentException(); 210 // return f.First().Id; 211 // } 180 212 181 213 public void PrintStats() { 182 214 Console.WriteLine(Q.Values.Max()); 183 var topTries = Q.Keys.OrderByDescending(key => T[key]).Take(50); 184 var topQs = Q.Keys.Where(key => key.Contains(",")).OrderByDescending(key => Q[key]).Take(50); 185 foreach (var t in topTries.Zip(topQs, Tuple.Create)) { 186 var id1 = t.Item1; 187 var id2 = t.Item2; 188 Console.WriteLine("{0,30} {1,6} {2:N4} {3,30} {4,6} {5:N4}", id1, T[id1], Q[id1], id2, T[id2], Q[id2]); 189 } 190 215 // var topTries = Q.Keys.OrderByDescending(key => T[key]).Take(50); 216 // var topQs = Q.Keys/*.Where(key => key.Contains("E"))*/.OrderByDescending(key => Q[key]).Take(50); 217 // foreach (var t in topTries.Zip(topQs, Tuple.Create)) { 218 // var id1 = t.Item1; 219 // var id2 = t.Item2; 220 // Console.WriteLine("{0,30} {1,6} {2:N4} {3,30} {4,6} {5:N4}", id1, T[id1], Q[id1], id2, T[id2], Q[id2]); 221 // } 222 223 foreach (var option in new String[] 224 { 225 "a*b", "c*d", "a*b+c*d", "e*f", "a*b+c*d+e*f", 226 "a*b+a*b", "c*d+c*d", 227 "a*a", "a*b","a*c","a*d","a*e","a*f","a*g","a*h","a*i","a*j", 228 "a*b","c*d","e*f","a*c","a*f","a*i","a*i*g","c*f","c*f*j", 229 "b+c","a+c","b+d","a+d", 230 "a*b+c*d+e*f", "a*b+c*d+e*f+a", "a*b+c*d+e*f+b", "a*b+c*d+e*f+c", "a*b+c*d+e*f+d","a*b+c*d+e*f+e", "a*b+c*d+e*f+f", "a*b+c*d+e*f+g", "a*b+c*d+e*f+h", "a*b+c*d+e*f+i", "a*b+c*d+e*f+j", 231 "a*b+c*d+e*f+a*g*i+c*j*f" 232 }) { 233 Console.WriteLine("{0,-10} {1:N5}", option, CalculateValue(option)); 234 } 235 236 // var topQs = Q.Keys/*.Where(key => key.Contains("E"))*/.OrderByDescending(key => Math.Abs(Q[key])).Take(10); 237 // foreach (var t in topQs) { 238 // Console.WriteLine("{0,30} {1:N4}", t, Q[t]); 239 // } 191 240 } 192 241 } -
branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/PartialExpressionInterpreter.cs
r12291 r12298 2 2 using System.Collections.Generic; 3 3 using System.Linq; 4 using System.Security.Policy; 4 5 using HeuristicLab.Common; 5 6 … … 9 10 private string sentence; 10 11 private int syIdx; 12 private HashSet<double> intermediateValues = new HashSet<double>(); 11 13 private Stack<double> stack = new Stack<double>(); 12 private Stack<char> opStack = new Stack<char>();13 14 // interprets sentences from L(G(Expr)): 14 15 // Expr -> Term { ('+' | '-' | '^' ) Term } … … 22 23 // The constant symbols '0' .. '9' are treated as ERC indices 23 24 24 public Stack<double> Interpret(string sentence, double[] vars) {25 public IEnumerable<double> Interpret(string sentence, double[] vars) { 25 26 return Interpret(sentence, vars, emptyErc); 26 27 } 27 28 28 public Stack<double> Interpret(string sentence, double[] vars, double[] erc) {29 public IEnumerable<double> Interpret(string sentence, double[] vars, double[] erc) { 29 30 InitLex(sentence); 30 stack.Clear(); opStack.Clear(); 31 intermediateValues.Clear(); 32 stack.Clear(); 31 33 Expr(vars, erc); 32 return new Stack<double>(stack);34 return intermediateValues; 33 35 } 34 36 … … 58 60 if (curSy == '+') { 59 61 NewSy(); 60 if (!Term(d, erc)) { stack.Push(-1.0);return false; }62 if (!Term(d, erc)) { return false; } 61 63 stack.Push(stack.Pop() + stack.Pop()); 64 intermediateValues.Add(stack.Peek()); 62 65 } else if (curSy == '-') { 63 66 NewSy(); 64 if (!Term(d, erc)) { stack.Push(-2.0); return false;return false; }67 if (!Term(d, erc)) { return false; } 65 68 stack.Push(-stack.Pop() + stack.Pop()); 69 intermediateValues.Add(stack.Peek()); 66 70 } else { 67 71 NewSy(); 68 if (!Term(d, erc)) { stack.Push(-3.0);return false; }72 if (!Term(d, erc)) { return false; } 69 73 var e = stack.Pop(); 70 74 var r = stack.Pop(); 71 75 stack.Push(Not(r) * e + r * Not(e)); // xor = (!x AND y) OR (x AND !y) 76 intermediateValues.Add(stack.Peek()); 72 77 } 73 78 curSy = CurSy(); … … 82 87 if (curSy == '*') { 83 88 NewSy(); 84 if (!Fact(d, erc)) { stack.Push(-4.0);return false; }89 if (!Fact(d, erc)) { return false; } 85 90 stack.Push(stack.Pop() * stack.Pop()); 91 intermediateValues.Add(stack.Peek()); 86 92 } else { 87 93 NewSy(); 88 if (!Fact(d, erc)) { stack.Push(-5.0);return false; }94 if (!Fact(d, erc)) { return false; } 89 95 var nom = stack.Pop(); 90 96 var r = stack.Pop(); 91 97 if (HeuristicLab.Common.Extensions.IsAlmost(nom, 0.0)) nom = 1.0; 92 98 stack.Push(r / nom); 99 intermediateValues.Add(stack.Peek()); 93 100 } 94 101 curSy = CurSy(); … … 100 107 var curSy = CurSy(); 101 108 if (curSy == '!') { 102 NewSy();103 if (!Expr(d, erc)) { stack.Push(-7.0); return false; }104 stack.Push(Not(stack.Pop()));109 //NewSy(); 110 //if (!Expr(d, erc)) { stack.Push(-7.0); return false; } 111 //stack.Push(Not(stack.Pop())); 105 112 } else if (curSy == '(') { 106 NewSy();107 if (!Expr(d, erc)) { stack.Push(-8.0); return false; }108 if (CurSy() != ')') throw new ArgumentException();109 NewSy();113 //NewSy(); 114 //if (!Expr(d, erc)) { stack.Push(-8.0); return false; } 115 //if (CurSy() != ')') throw new ArgumentException(); 116 //NewSy(); 110 117 } else if (curSy >= 'a' && curSy <= 'z') { 111 118 int o = (byte)curSy - (byte)'a'; … … 113 120 if (o < 0 || o >= d.Length) throw new ArgumentException(); 114 121 stack.Push(d[o]); 122 intermediateValues.Add(stack.Peek()); 115 123 NewSy(); 116 124 } else if (curSy == '/') { 117 125 // /-symbol is used in the expressionextender to represent inverse (1/x). 118 126 // this is necessary because we also use symbols 0..9 as indices for ERCs 119 NewSy();120 if (!Fact(d, erc)) { stack.Push(-9.0); return false; }121 stack.Push(1.0 / stack.Pop());127 //NewSy(); 128 //if (!Fact(d, erc)) { stack.Push(-9.0); return false; } 129 //stack.Push(1.0 / stack.Pop()); 122 130 } else if (curSy >= '0' && curSy <= '9') { 123 131 int o = (byte)curSy - (byte)'0'; … … 125 133 if (o < 0 || o >= 10) throw new ArgumentException(); 126 134 stack.Push(erc[o]); 135 intermediateValues.Add(stack.Peek()); 127 136 NewSy(); 128 137 } else { -
branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/Problems/SymbolicRegressionPoly10Problem.cs
r12295 r12298 156 156 // splits the phrase into terms and creates (sparse) term-occurrance features 157 157 public IEnumerable<Feature> GetFeatures(string phrase) { 158 // var canonicalTerms = new HashSet<string>(); 159 // foreach (string t in phrase.Split('+')) { 160 // canonicalTerms.Add(CanonicalTerm(t)); 158 //if (phrase.EndsWith("E")) phrase = phrase.TrimEnd('*', '+', 'E'); 159 //yield return new Feature("$$$", 1.0); // const 160 //var canonicalTerms = new HashSet<string>(); 161 //foreach (string t in phrase.Split('+')) { 162 // canonicalTerms.Add(CanonicalTerm(t)); 163 //} 164 //return canonicalTerms.Select(entry => new Feature(entry, 1.0)); 165 //.Concat(new Feature[] { new Feature(CanonicalRepresentation(phrase), 1.0) }); 166 167 168 if (phrase.EndsWith("E")) phrase = phrase.TrimEnd('*', '+', 'E'); 169 //var len = 5; 170 //var start = Math.Max(0, phrase.Length - len); 171 //var end = Math.Min(phrase.Length, start + len); 172 //string f = phrase.Substring(start, end - start); 173 //yield return new Feature(f, 1.0); 174 // 175 176 var terms = phrase.Split('+'); 177 foreach (var t in terms.Distinct()) yield return new Feature(t, 1.0); 178 179 for (int i = 0; i < terms.Length; i++) { 180 for (int j = i + 1; j < terms.Length; j++) { 181 yield return new Feature(terms[i] + " " + terms[j], 1.0); 182 } 183 } 184 185 // var substrings = new HashSet<string>(); 186 // for (int start = 0; start <= phrase.Length - 2; start += 2) { 187 // var s = phrase.Substring(start, 3); 188 // substrings.Add(s); 161 189 // } 162 // return canonicalTerms.Select(entry => new Feature(entry, 1.0)) 163 // .Concat(new Feature[] { new Feature(CanonicalRepresentation(phrase), 1.0) }); 164 165 return new Feature[] { new Feature(phrase, 1.0), }; 166 167 // var partialInterpreter = new PartialExpressionInterpreter(); 168 // var vars = new double[] { 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, }; 169 // var s = partialInterpreter.Interpret(phrase, vars); 170 // //if (s.Any()) 171 // // return new Feature[] { new Feature(s.Pop().ToString(), 1.0), }; 172 // //else 173 // // return new Feature[] { new Feature("$", 1.0), }; 174 // return new Feature[] { new Feature(string.Join(",", s), 1.0) }; 190 // 191 // var list = new List<string>(substrings); 192 // 193 // for (int i = 0; i < list.Count; i++) { 194 // yield return new Feature(list[i], 1.0); 195 // //for (int j = i+1; j < list.Count; j++) { 196 // // yield return new Feature(list[i] + " " + list[j], 1.0); 197 // //} 198 // } 199 200 // 201 // for (int len = 1; len <= phrase.Length; len += 2) { 202 // var start = Math.Max(0, phrase.Length - len); 203 // var end = Math.Min(phrase.Length, start + len); 204 // string f = phrase.Substring(start, end - start); 205 // yield return new Feature(f, 1.0); 206 // 207 // } 208 209 //var partialInterpreter = new PartialExpressionInterpreter(); 210 //var vars = new double[] { 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, }; 211 //var s = partialInterpreter.Interpret(phrase, vars); 212 ////if (s.Any()) 213 //// return new Feature[] { new Feature(s.Pop().ToString(), 1.0), }; 214 ////else 215 //// return new Feature[] { new Feature("$", 1.0), }; 216 //return s.Select(f => new Feature(f.ToString(), 1.0)); 175 217 } 176 218 -
branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/HeuristicLab.Problems.GrammaticalOptimization/SentenceSetStatistics.cs
r11865 r12298 50 50 public override string ToString() { 51 51 return 52 string.Format("Sentences: {0,10} avg.-quality {1,7:F5} best {2,7:F5} {3,2} {4,10} {5,30} first {6,7:F5} {7,20} last {8,7:F5} {9,20}",52 string.Format("Sentences: {0,10} avg.-quality {1,7:F5} best {2,7:F5} {3,2} {4,10} {5,30} last {6,7:F5} {7,20}", 53 53 NumberOfSentences, AverageQuality, 54 54 BestSentenceQuality, DoubleExtensions.IsAlmost(BestSentenceQuality, bestKnownQuality) ? 1.0 : 0.0, 55 55 BestSentenceIndex, TrimToSize(BestSentence, 30), 56 FirstSentenceQuality, TrimToSize(FirstSentence, 20),57 56 LastSentenceQuality, TrimToSize(LastSentence, 20) 57 //LastSentenceQuality, TrimToSize(LastSentence, 20) 58 58 ); 59 59 } -
branches/HeuristicLab.Problems.GrammaticalOptimization-gkr/Main/Program.cs
r12295 r12298 1 1 using System; 2 using System.Collections.Generic; 2 3 using System.Diagnostics; 3 4 using System.Globalization; 5 using System.Linq; 6 using System.Text.RegularExpressions; 4 7 using HeuristicLab.Algorithms.Bandits.BanditPolicies; 5 8 using HeuristicLab.Algorithms.Bandits.GrammarPolicies; … … 38 41 39 42 var globalStatistics = new SentenceSetStatistics(); 43 ResetAlleleStatistics(); 40 44 var random = new Random(); 41 45 … … 66 70 iterations++; 67 71 globalStatistics.AddSentence(sentence, quality); 68 72 UpdateAlleleStatistics(sentence); 69 73 // comment this if you don't want to see solver statistics 70 74 if (iterations % 100 == 0) { 71 if (iterations % 1000 == 0) Console.Clear(); 75 if (iterations % 1000 == 0) { 76 Console.Clear(); 77 } 72 78 Console.SetCursorPosition(0, 0); 73 alg.PrintStats(); 74 //policy.PrintStats(); 79 Console.WriteLine(iterations); 80 WriteAlleleStatistics(); 81 Console.WriteLine(globalStatistics.BestSentenceQuality); 82 Console.WriteLine(globalStatistics.BestSentence); 83 Console.WriteLine(globalStatistics); 84 //alg.PrintStats(); 85 policy.PrintStats(); 86 //ResetAlleleStatistics(); 75 87 } 76 88 77 89 // uncomment this if you want to collect statistics of the generated sentences 78 90 //if (iterations % 100 == 0) { … … 94 106 } 95 107 } 108 109 private static void UpdateAlleleStatistics(string sentence) { 110 for (int i = 0; i < sentence.Length; i++) { 111 var allele = sentence.Substring(i, 1); 112 if (alleleStatistics.ContainsKey(allele)) alleleStatistics[allele]++; 113 } 114 for (int i = 0; i < sentence.Length - 2; i+=2) { 115 var allele = sentence.Substring(i, 3); 116 if (alleleStatistics.ContainsKey(allele)) alleleStatistics[allele]++; 117 } 118 for (int i = 0; i < sentence.Length - 4; i+=2) { 119 var allele = sentence.Substring(i, 5); 120 if (alleleStatistics.ContainsKey(allele)) alleleStatistics[allele]++; 121 } 122 } 123 124 125 private static Dictionary<string, int> alleleStatistics; 126 127 private static void ResetAlleleStatistics() { 128 alleleStatistics = new Dictionary<string, int>() 129 { 130 {"a", 0}, 131 {"b", 0}, 132 {"c", 0}, 133 {"d", 0}, 134 {"e", 0}, 135 {"f", 0}, 136 {"g", 0}, 137 {"h", 0}, 138 {"i", 0}, 139 {"j", 0}, 140 {"a*b", 0}, 141 {"b*a", 0}, 142 {"c*d", 0}, 143 {"d*c", 0}, 144 {"e*f", 0}, 145 {"f*e", 0}, 146 {"a*g*i", 0}, 147 {"a*i*g", 0}, 148 {"g*a*i", 0}, 149 {"g*i*a", 0}, 150 {"i*g*a", 0}, 151 {"i*a*g", 0}, 152 {"j*c*f", 0}, 153 {"j*f*c", 0}, 154 {"c*j*f", 0}, 155 {"c*f*j", 0}, 156 {"f*c*j", 0}, 157 {"f*j*c", 0} 158 }; 159 } 160 161 162 private static void WriteAlleleStatistics() { 163 double count = alleleStatistics.Sum(e => e.Value); 164 foreach (var entry in alleleStatistics.OrderByDescending(e=>e.Value)) { 165 Console.WriteLine("{0,-10} {1,-10}", entry.Key, entry.Value); 166 } 167 } 96 168 } 97 169 }
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