/// <summary>
/// <inheritdoc/>
/// </summary>
public override double[] MappingToFeatureSpace(Parameter param)
{
var singleValue = param.AsType <float>();
var doubleValue = Convert.ToDouble(singleValue);
return(base.MappingToFeatureSpace(Parameter.FromDouble(doubleValue)));
}
/// <summary>
/// <inheritdoc/>
/// </summary>
public override double[] MappingToFeatureSpace(Parameter param)
{
var value = param.AsType <int>();
var valueAsDouble = Convert.ToDouble(value);
return(base.MappingToFeatureSpace(Parameter.FromDouble(valueAsDouble)));
}
public override double[] MappingToFeatureSpace(Parameter param)
{
if (this.FeatureSpaceDim == 0)
{
return(new double[0]);
}
var value = param.AsType <object>();
var x = Array.BinarySearch(this.Choices, value);
Contracts.Check(x != -1, $"{value} not contains");
return(this._option.MappingToFeatureSpace(Parameter.FromInt(x)));
}
/// <summary>
/// <inheritdoc/>
/// </summary>
public override double[] MappingToFeatureSpace(Parameter param)
{
var x = param.AsType <double>();
Contracts.Check(x <= this.Max && x >= this.Min, $"{x} is not within [{this.Min}, {this.Max}]");
if (this.LogBase)
{
var logMax = Math.Log(this.Max);
var logMin = Math.Log(this.Min);
var logX = Math.Log(x);
return(new[] { logX / (logMax - logMin) - logMin / (logMax - logMin) });
}
else
{
return(new[] { x / (this.Max - this.Min) - this.Min / (this.Max - this.Min) });
}
}
