[5571] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17180] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[5571] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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[17455] | 24 | using HeuristicLab.Analysis;
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[5571] | 25 | using HeuristicLab.Common;
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| 26 | using HeuristicLab.Core;
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[6740] | 27 | using HeuristicLab.Data;
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[5571] | 28 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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[6740] | 29 | using HeuristicLab.Parameters;
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[16565] | 30 | using HEAL.Attic;
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[17455] | 31 | using MathNet.Numerics.LinearAlgebra;
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[17448] | 32 | using MathNet.Numerics.Statistics;
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[5571] | 33 |
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[17455] | 34 | using DoubleVector = MathNet.Numerics.LinearAlgebra.Vector<double>;
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| 35 |
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[5571] | 36 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
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[17455] | 37 | [StorableType("DE68A1D9-5AFC-4DDD-AB62-29F3B8FC28E0")]
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| 38 | [Item("SymbolicDataAnalysisExpressionTreeVectorInterpreter", "Interpreter for symbolic expression trees including vector arithmetic.")]
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| 39 | public class SymbolicDataAnalysisExpressionTreeVectorInterpreter : ParameterizedNamedItem, ISymbolicDataAnalysisExpressionTreeInterpreter {
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| 40 |
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[7615] | 41 | private const string EvaluatedSolutionsParameterName = "EvaluatedSolutions";
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[5571] | 42 |
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[13248] | 43 | public override bool CanChangeName {
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| 44 | get { return false; }
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| 45 | }
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[5571] | 46 |
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[13248] | 47 | public override bool CanChangeDescription {
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| 48 | get { return false; }
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| 49 | }
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| 50 |
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[5749] | 51 | #region parameter properties
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[13248] | 52 | public IFixedValueParameter<IntValue> EvaluatedSolutionsParameter {
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| 53 | get { return (IFixedValueParameter<IntValue>)Parameters[EvaluatedSolutionsParameterName]; }
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[7615] | 54 | }
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[5749] | 55 | #endregion
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| 56 |
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| 57 | #region properties
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[13248] | 58 | public int EvaluatedSolutions {
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| 59 | get { return EvaluatedSolutionsParameter.Value.Value; }
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| 60 | set { EvaluatedSolutionsParameter.Value.Value = value; }
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[7615] | 61 | }
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[5749] | 62 | #endregion
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| 63 |
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[5571] | 64 | [StorableConstructor]
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[17455] | 65 | protected SymbolicDataAnalysisExpressionTreeVectorInterpreter(StorableConstructorFlag _) : base(_) { }
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[13248] | 66 |
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[17455] | 67 | protected SymbolicDataAnalysisExpressionTreeVectorInterpreter(SymbolicDataAnalysisExpressionTreeVectorInterpreter original, Cloner cloner)
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[13251] | 68 | : base(original, cloner) { }
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[13248] | 69 |
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[5571] | 70 | public override IDeepCloneable Clone(Cloner cloner) {
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[17455] | 71 | return new SymbolicDataAnalysisExpressionTreeVectorInterpreter(this, cloner);
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[5571] | 72 | }
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| 73 |
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[17455] | 74 | public SymbolicDataAnalysisExpressionTreeVectorInterpreter()
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| 75 | : base("SymbolicDataAnalysisExpressionTreeVectorInterpreter", "Interpreter for symbolic expression trees including vector arithmetic.") {
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[13248] | 76 | Parameters.Add(new FixedValueParameter<IntValue>(EvaluatedSolutionsParameterName, "A counter for the total number of solutions the interpreter has evaluated", new IntValue(0)));
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[5571] | 77 | }
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| 78 |
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[17455] | 79 | protected SymbolicDataAnalysisExpressionTreeVectorInterpreter(string name, string description)
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[8436] | 80 | : base(name, description) {
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[13248] | 81 | Parameters.Add(new FixedValueParameter<IntValue>(EvaluatedSolutionsParameterName, "A counter for the total number of solutions the interpreter has evaluated", new IntValue(0)));
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[8436] | 82 | }
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| 83 |
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[7615] | 84 | [StorableHook(HookType.AfterDeserialization)]
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| 85 | private void AfterDeserialization() {
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[17455] | 86 |
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[7615] | 87 | }
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| 88 |
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| 89 | #region IStatefulItem
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| 90 | public void InitializeState() {
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[13248] | 91 | EvaluatedSolutions = 0;
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[7615] | 92 | }
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| 93 |
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[13248] | 94 | public void ClearState() { }
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[7615] | 95 | #endregion
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| 96 |
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[13251] | 97 | private readonly object syncRoot = new object();
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[17455] | 98 | public IEnumerable<double> GetSymbolicExpressionTreeValues(ISymbolicExpressionTree tree, IDataset dataset, IEnumerable<int> rows) {
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[13251] | 99 | lock (syncRoot) {
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[13248] | 100 | EvaluatedSolutions++; // increment the evaluated solutions counter
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[9004] | 101 | }
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[8436] | 102 | var state = PrepareInterpreterState(tree, dataset);
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| 103 |
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| 104 | foreach (var rowEnum in rows) {
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| 105 | int row = rowEnum;
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[17455] | 106 | var result = Evaluate(dataset, ref row, state);
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[17463] | 107 | if (result.IsScalar)
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| 108 | yield return result.Scalar;
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| 109 | else
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| 110 | yield return double.NaN;
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| 111 | //if (!result.IsScalar)
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| 112 | // throw new InvalidOperationException("Result of the tree is not a scalar.");
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| 113 | //yield return result.Scalar;
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[8436] | 114 | state.Reset();
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| 115 | }
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[7154] | 116 | }
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| 117 |
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[12509] | 118 | private static InterpreterState PrepareInterpreterState(ISymbolicExpressionTree tree, IDataset dataset) {
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[8436] | 119 | Instruction[] code = SymbolicExpressionTreeCompiler.Compile(tree, OpCodes.MapSymbolToOpCode);
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[5987] | 120 | int necessaryArgStackSize = 0;
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[8436] | 121 | foreach (Instruction instr in code) {
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[6860] | 122 | if (instr.opCode == OpCodes.Variable) {
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[8436] | 123 | var variableTreeNode = (VariableTreeNode)instr.dynamicNode;
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[17460] | 124 | if (dataset.VariableHasType<double>(variableTreeNode.VariableName))
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| 125 | instr.data = dataset.GetReadOnlyDoubleValues(variableTreeNode.VariableName);
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| 126 | else if (dataset.VariableHasType<DoubleVector>(variableTreeNode.VariableName))
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| 127 | instr.data = dataset.GetReadOnlyDoubleVectorValues(variableTreeNode.VariableName);
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| 128 | else throw new NotSupportedException($"Type of variable {variableTreeNode.VariableName} is not supported.");
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[14826] | 129 | } else if (instr.opCode == OpCodes.FactorVariable) {
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| 130 | var factorTreeNode = instr.dynamicNode as FactorVariableTreeNode;
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| 131 | instr.data = dataset.GetReadOnlyStringValues(factorTreeNode.VariableName);
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| 132 | } else if (instr.opCode == OpCodes.BinaryFactorVariable) {
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| 133 | var factorTreeNode = instr.dynamicNode as BinaryFactorVariableTreeNode;
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| 134 | instr.data = dataset.GetReadOnlyStringValues(factorTreeNode.VariableName);
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[5571] | 135 | } else if (instr.opCode == OpCodes.LagVariable) {
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[8436] | 136 | var laggedVariableTreeNode = (LaggedVariableTreeNode)instr.dynamicNode;
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[9828] | 137 | instr.data = dataset.GetReadOnlyDoubleValues(laggedVariableTreeNode.VariableName);
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[6860] | 138 | } else if (instr.opCode == OpCodes.VariableCondition) {
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[8436] | 139 | var variableConditionTreeNode = (VariableConditionTreeNode)instr.dynamicNode;
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[9828] | 140 | instr.data = dataset.GetReadOnlyDoubleValues(variableConditionTreeNode.VariableName);
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[5987] | 141 | } else if (instr.opCode == OpCodes.Call) {
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| 142 | necessaryArgStackSize += instr.nArguments + 1;
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[5571] | 143 | }
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| 144 | }
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[8436] | 145 | return new InterpreterState(code, necessaryArgStackSize);
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| 146 | }
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[5571] | 147 |
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[17455] | 148 |
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| 149 | public struct EvaluationResult {
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| 150 | public double Scalar { get; }
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| 151 | public bool IsScalar => !double.IsNaN(Scalar);
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| 152 |
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| 153 | public DoubleVector Vector { get; }
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[17465] | 154 | public bool IsVector => !(Vector.Count == 1 && double.IsNaN(Vector[0]));
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[17455] | 155 |
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| 156 | public bool IsNaN => !IsScalar && !IsVector;
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| 157 |
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| 158 | public EvaluationResult(double scalar) {
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| 159 | Scalar = scalar;
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[17465] | 160 | Vector = NaNVector;
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[17455] | 161 | }
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| 162 | public EvaluationResult(DoubleVector vector) {
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[17463] | 163 | if (vector == null) throw new ArgumentNullException(nameof(vector));
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[17455] | 164 | Vector = vector;
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| 165 | Scalar = double.NaN;
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| 166 | }
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| 167 |
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| 168 | public override string ToString() {
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| 169 | if (IsScalar) return Scalar.ToString();
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| 170 | if (IsVector) return Vector.ToVectorString();
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| 171 | return "NaN";
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| 172 | }
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| 173 |
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[17465] | 174 | private static readonly DoubleVector NaNVector = DoubleVector.Build.Dense(1, double.NaN);
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[17455] | 175 | public static readonly EvaluationResult NaN = new EvaluationResult(double.NaN);
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| 176 | }
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| 177 |
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| 178 | private static EvaluationResult ArithmeticApply(EvaluationResult lhs, EvaluationResult rhs,
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| 179 | Func<double, double, double> ssFunc = null,
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| 180 | Func<double, DoubleVector, DoubleVector> svFunc = null,
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| 181 | Func<DoubleVector, double, DoubleVector> vsFunc = null,
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| 182 | Func<DoubleVector, DoubleVector, DoubleVector> vvFunc = null) {
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| 183 | if (lhs.IsScalar && rhs.IsScalar && ssFunc != null) return new EvaluationResult(ssFunc(lhs.Scalar, rhs.Scalar));
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| 184 | if (lhs.IsScalar && rhs.IsVector && svFunc != null) return new EvaluationResult(svFunc(lhs.Scalar, rhs.Vector));
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| 185 | if (lhs.IsVector && rhs.IsScalar && vsFunc != null) return new EvaluationResult(vsFunc(lhs.Vector, rhs.Scalar));
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| 186 | if (lhs.IsVector && rhs.IsVector && vvFunc != null) return new EvaluationResult(vvFunc(lhs.Vector, rhs.Vector));
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[17463] | 187 | return EvaluationResult.NaN;
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[17455] | 188 | }
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| 189 |
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| 190 | private static EvaluationResult FunctionApply(EvaluationResult val,
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| 191 | Func<double, double> sFunc = null,
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| 192 | Func<DoubleVector, DoubleVector> vFunc = null) {
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| 193 | if (val.IsScalar && sFunc != null) return new EvaluationResult(sFunc(val.Scalar));
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| 194 | if (val.IsVector && vFunc != null) return new EvaluationResult(vFunc(val.Vector));
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[17463] | 195 | return EvaluationResult.NaN;
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[17455] | 196 | }
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[17460] | 197 | private static EvaluationResult AggregateApply(EvaluationResult val,
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| 198 | Func<double, double> sFunc = null,
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| 199 | Func<DoubleVector, double> vFunc = null) {
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| 200 | if (val.IsScalar && sFunc != null) return new EvaluationResult(sFunc(val.Scalar));
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| 201 | if (val.IsVector && vFunc != null) return new EvaluationResult(vFunc(val.Vector));
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[17463] | 202 | return EvaluationResult.NaN;
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[17460] | 203 | }
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[17455] | 204 |
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| 205 | public virtual EvaluationResult Evaluate(IDataset dataset, ref int row, InterpreterState state) {
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[5571] | 206 | Instruction currentInstr = state.NextInstruction();
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| 207 | switch (currentInstr.opCode) {
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| 208 | case OpCodes.Add: {
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[17455] | 209 | var cur = Evaluate(dataset, ref row, state);
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[5571] | 210 | for (int i = 1; i < currentInstr.nArguments; i++) {
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[17455] | 211 | var op = Evaluate(dataset, ref row, state);
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| 212 | cur = ArithmeticApply(cur, op,
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| 213 | (s1, s2) => s1 + s2,
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| 214 | (s1, v2) => s1 + v2,
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| 215 | (v1, s2) => v1 + s2,
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| 216 | (v1, v2) => v1 + v2);
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[5571] | 217 | }
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[17455] | 218 | return cur;
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[5571] | 219 | }
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| 220 | case OpCodes.Sub: {
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[17455] | 221 | var cur = Evaluate(dataset, ref row, state);
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[5571] | 222 | for (int i = 1; i < currentInstr.nArguments; i++) {
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[17455] | 223 | var op = Evaluate(dataset, ref row, state);
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| 224 | cur = ArithmeticApply(cur, op,
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| 225 | (s1, s2) => s1 - s2,
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| 226 | (s1, v2) => s1 - v2,
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| 227 | (v1, s2) => v1 - s2,
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| 228 | (v1, v2) => v1 - v2);
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[5571] | 229 | }
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[17455] | 230 | return cur;
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[5571] | 231 | }
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| 232 | case OpCodes.Mul: {
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[17455] | 233 | var cur = Evaluate(dataset, ref row, state);
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[5571] | 234 | for (int i = 1; i < currentInstr.nArguments; i++) {
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[17455] | 235 | var op = Evaluate(dataset, ref row, state);
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| 236 | cur = ArithmeticApply(cur, op,
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| 237 | (s1, s2) => s1 * s2,
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| 238 | (s1, v2) => s1 * v2,
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| 239 | (v1, s2) => v1 * s2,
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| 240 | (v1, v2) => v1.PointwiseMultiply(v2));
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[5571] | 241 | }
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[17455] | 242 | return cur;
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[5571] | 243 | }
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| 244 | case OpCodes.Div: {
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[17455] | 245 | var cur = Evaluate(dataset, ref row, state);
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[5571] | 246 | for (int i = 1; i < currentInstr.nArguments; i++) {
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[17455] | 247 | var op = Evaluate(dataset, ref row, state);
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| 248 | cur = ArithmeticApply(cur, op,
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| 249 | (s1, s2) => s1 / s2,
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| 250 | (s1, v2) => s1 / v2,
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| 251 | (v1, s2) => v1 / s2,
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| 252 | (v1, v2) => v1 / v2);
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[5571] | 253 | }
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[17455] | 254 | return cur;
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[5571] | 255 | }
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[16356] | 256 | case OpCodes.Absolute: {
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[17455] | 257 | var cur = Evaluate(dataset, ref row, state);
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| 258 | return FunctionApply(cur, Math.Abs, DoubleVector.Abs);
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[16356] | 259 | }
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[16656] | 260 | case OpCodes.Tanh: {
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[17455] | 261 | var cur = Evaluate(dataset, ref row, state);
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| 262 | return FunctionApply(cur, Math.Tanh, DoubleVector.Tanh);
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[16656] | 263 | }
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[5571] | 264 | case OpCodes.Cos: {
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[17455] | 265 | var cur = Evaluate(dataset, ref row, state);
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| 266 | return FunctionApply(cur, Math.Cos, DoubleVector.Cos);
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[5571] | 267 | }
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| 268 | case OpCodes.Sin: {
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[17455] | 269 | var cur = Evaluate(dataset, ref row, state);
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| 270 | return FunctionApply(cur, Math.Sin, DoubleVector.Sin);
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[5571] | 271 | }
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| 272 | case OpCodes.Tan: {
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[17455] | 273 | var cur = Evaluate(dataset, ref row, state);
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| 274 | return FunctionApply(cur, Math.Tan, DoubleVector.Tan);
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[5571] | 275 | }
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[7842] | 276 | case OpCodes.Square: {
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[17455] | 277 | var cur = Evaluate(dataset, ref row, state);
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| 278 | return FunctionApply(cur,
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| 279 | s => Math.Pow(s, 2),
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| 280 | v => v.PointwisePower(2));
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[7842] | 281 | }
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[16356] | 282 | case OpCodes.Cube: {
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[17455] | 283 | var cur = Evaluate(dataset, ref row, state);
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| 284 | return FunctionApply(cur,
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| 285 | s => Math.Pow(s, 3),
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| 286 | v => v.PointwisePower(3));
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[16356] | 287 | }
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[5571] | 288 | case OpCodes.Power: {
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[17455] | 289 | var x = Evaluate(dataset, ref row, state);
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| 290 | var y = Evaluate(dataset, ref row, state);
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| 291 | return ArithmeticApply(x, y,
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| 292 | (s1, s2) => Math.Pow(s1, Math.Round(s2)),
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| 293 | (s1, v2) => DoubleVector.Build.Dense(v2.Count, s1).PointwisePower(DoubleVector.Round(v2)),
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| 294 | (v1, s2) => v1.PointwisePower(Math.Round(s2)),
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| 295 | (v1, v2) => v1.PointwisePower(DoubleVector.Round(v2)));
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[5571] | 296 | }
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[7842] | 297 | case OpCodes.SquareRoot: {
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[17455] | 298 | var cur = Evaluate(dataset, ref row, state);
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| 299 | return FunctionApply(cur,
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| 300 | s => Math.Sqrt(s),
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| 301 | v => DoubleVector.Sqrt(v));
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[7842] | 302 | }
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[16356] | 303 | case OpCodes.CubeRoot: {
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[17455] | 304 | var cur = Evaluate(dataset, ref row, state);
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| 305 | return FunctionApply(cur,
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| 306 | s => s < 0 ? -Math.Pow(-s, 1.0 / 3.0) : Math.Pow(s, 1.0 / 3.0),
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| 307 | v => v.Map(s => s < 0 ? -Math.Pow(-s, 1.0 / 3.0) : Math.Pow(s, 1.0 / 3.0)));
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[16356] | 308 | }
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[5571] | 309 | case OpCodes.Root: {
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[17455] | 310 | var x = Evaluate(dataset, ref row, state);
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| 311 | var y = Evaluate(dataset, ref row, state);
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| 312 | return ArithmeticApply(x, y,
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| 313 | (s1, s2) => Math.Pow(s1, 1.0 / Math.Round(s2)),
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| 314 | (s1, v2) => DoubleVector.Build.Dense(v2.Count, s1).PointwisePower(1.0 / DoubleVector.Round(v2)),
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| 315 | (v1, s2) => v1.PointwisePower(1.0 / Math.Round(s2)),
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| 316 | (v1, v2) => v1.PointwisePower(1.0 / DoubleVector.Round(v2)));
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[5571] | 317 | }
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| 318 | case OpCodes.Exp: {
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[17455] | 319 | var cur = Evaluate(dataset, ref row, state);
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| 320 | return FunctionApply(cur,
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| 321 | s => Math.Exp(s),
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| 322 | v => DoubleVector.Exp(v));
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[5571] | 323 | }
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| 324 | case OpCodes.Log: {
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[17455] | 325 | var cur = Evaluate(dataset, ref row, state);
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| 326 | return FunctionApply(cur,
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| 327 | s => Math.Log(s),
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| 328 | v => DoubleVector.Log(v));
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[5571] | 329 | }
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[17460] | 330 | case OpCodes.Sum: {
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| 331 | var cur = Evaluate(dataset, ref row, state);
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| 332 | return AggregateApply(cur,
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| 333 | s => s,
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| 334 | v => v.Sum());
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| 335 | }
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[17466] | 336 | case OpCodes.Mean: {
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[17460] | 337 | var cur = Evaluate(dataset, ref row, state);
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| 338 | return AggregateApply(cur,
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| 339 | s => s,
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| 340 | v => v.Mean());
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| 341 | }
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[17463] | 342 | case OpCodes.StandardDeviation: {
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| 343 | var cur = Evaluate(dataset, ref row, state);
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| 344 | return AggregateApply(cur,
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| 345 | s => 0,
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| 346 | v => v.Count > 1 ? Statistics.StandardDeviation(v) : 0);
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| 347 | }
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[5571] | 348 | case OpCodes.Variable: {
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[17455] | 349 | if (row < 0 || row >= dataset.Rows) return EvaluationResult.NaN;
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[6740] | 350 | var variableTreeNode = (VariableTreeNode)currentInstr.dynamicNode;
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[17455] | 351 | if (currentInstr.data is IList<double> doubleList)
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| 352 | return new EvaluationResult(doubleList[row] * variableTreeNode.Weight);
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| 353 | if (currentInstr.data is IList<DoubleVector> doubleVectorList)
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| 354 | return new EvaluationResult(doubleVectorList[row] * variableTreeNode.Weight);
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| 355 | throw new NotSupportedException($"Unsupported type of variable: {currentInstr.data.GetType().GetPrettyName()}");
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[5571] | 356 | }
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[14826] | 357 | case OpCodes.BinaryFactorVariable: {
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[17455] | 358 | if (row < 0 || row >= dataset.Rows) return EvaluationResult.NaN;
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[14826] | 359 | var factorVarTreeNode = currentInstr.dynamicNode as BinaryFactorVariableTreeNode;
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[17455] | 360 | return new EvaluationResult(((IList<string>)currentInstr.data)[row] == factorVarTreeNode.VariableValue ? factorVarTreeNode.Weight : 0);
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[14826] | 361 | }
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| 362 | case OpCodes.FactorVariable: {
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[17455] | 363 | if (row < 0 || row >= dataset.Rows) return EvaluationResult.NaN;
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[14826] | 364 | var factorVarTreeNode = currentInstr.dynamicNode as FactorVariableTreeNode;
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[17455] | 365 | return new EvaluationResult(factorVarTreeNode.GetValue(((IList<string>)currentInstr.data)[row]));
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[14826] | 366 | }
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[5571] | 367 | case OpCodes.Constant: {
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[8436] | 368 | var constTreeNode = (ConstantTreeNode)currentInstr.dynamicNode;
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[17455] | 369 | return new EvaluationResult(constTreeNode.Value);
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[5571] | 370 | }
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| 371 |
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[13248] | 372 | default:
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[17455] | 373 | throw new NotSupportedException($"Unsupported OpCode: {currentInstr.opCode}");
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[5571] | 374 | }
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| 375 | }
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| 376 | }
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[13248] | 377 | } |
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