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source: branches/2719_HeuristicLab.DatastreamAnalysis/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/ExponentialTransformation.cs @ 17980

Last change on this file since 17980 was 17980, checked in by jzenisek, 3 years ago

#2719 merged head of HeuristicLab.Problems.DataAnalysis into branch; added several minor items

File size: 1.8 KB
Line 
1using System;
2using System.Collections.Generic;
3using System.Linq;
4using HeuristicLab.Common;
5using HeuristicLab.Core;
6using HeuristicLab.Data;
7using HeuristicLab.Parameters;
8using HEAL.Attic;
9
10namespace HeuristicLab.Problems.DataAnalysis {
11  [StorableType("AAB32034-FA4A-4D70-937F-EF026C1D508A")]
12  [Item("Exponential Transformation", "f(x) = b ^ x | Represents a exponential transformation.")]
13  public class ExponentialTransformation : Transformation<double> {
14    protected const string BaseParameterName = "Base";
15
16    #region Parameters
17    public IValueParameter<DoubleValue> BaseParameter {
18      get { return (IValueParameter<DoubleValue>)Parameters[BaseParameterName]; }
19    }
20    #endregion
21
22    #region properties
23    public override string ShortName {
24      get { return "Exp"; }
25    }
26    public double Base {
27      get { return BaseParameter.Value.Value; }
28    }
29    #endregion
30
31    [StorableConstructor]
32    protected ExponentialTransformation(StorableConstructorFlag _) : base(_) { }
33
34    protected ExponentialTransformation(ExponentialTransformation original, Cloner cloner)
35      : base(original, cloner) {
36    }
37
38    public ExponentialTransformation(IEnumerable<string> allowedColumns)
39      : base(allowedColumns) {
40      Parameters.Add(new ValueParameter<DoubleValue>(BaseParameterName, "b | Base of exp-function", new DoubleValue(Math.E)));
41    }
42
43    public override IDeepCloneable Clone(Cloner cloner) {
44      return new ExponentialTransformation(this, cloner);
45    }
46
47    public override IEnumerable<double> Apply(IEnumerable<double> data) {
48      return data.Select(d => Math.Pow(Base, d));
49    }
50
51    public override bool Check(IEnumerable<double> data, out string errorMsg) {
52      errorMsg = "";
53      return true;
54    }
55  }
56}
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