Changeset 11313 for trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/ValueGenerator.cs
 Timestamp:
 08/27/14 12:00:56 (10 years ago)
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 1 edited
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trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/ValueGenerator.cs
r11171 r11313 46 46 x += stepWidth; 47 47 } 48 } 49 50 /// <summary> 51 /// Generate a logarithmic sequence between start and end by applying a powerof10 function to an underlying evenly spaced sequence 52 /// </summary> 53 /// <param name="start">The start of the sequence</param> 54 /// <param name="end">The end of the sequence</param> 55 /// <param name="stepWidth">The stepwidth for the original sequence before the points are transformed</param> 56 /// <returns>A logarithmic sequence from start to end (inclusive)</returns> 57 public static IEnumerable<double> GenerateLogarithmicSteps(double start, double end, double stepWidth) { 58 return GenerateSteps(start, end, stepWidth, x => Math.Pow(10, x)); 59 } 60 61 /// <summary> 62 /// Generates a sequence of points between start and end according to given transformation 63 /// </summary> 64 /// <param name="start">The smallest and first value of the sequence.</param> 65 /// <param name="end">The largest and last value of the sequence.</param> 66 /// <param name="stepWidth">The step size between subsequent values (before transform)</param> 67 /// <param name="transform">The transform function</param> 68 /// <returns></returns> 69 public static IEnumerable<double> GenerateSteps(double start, double end, double stepWidth, Func<double, double> transform) { 70 return GenerateSteps(start, end, stepWidth).Select(transform).Where(x => x < end  x.IsAlmost(end)); 48 71 } 49 72
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