public static TransformFunction Create(string funcName, string[] parameters, int idxStart)
{
TransformFunction transFunc;
switch (funcName)
{
case "linear":
transFunc = new LinearTransform(parameters, idxStart);
break;
case "bucket":
transFunc = new BucketTransform(parameters, idxStart);
break;
case "rational":
transFunc = new RationalTransform(parameters, idxStart);
break;
case "loglinear":
transFunc = new LogLinearTransform(parameters, idxStart);
break;
case "DecisionTree":
transFunc = new DecisionTreeTransform(parameters, idxStart);
break;
case "BM25F2":
transFunc = new BM25F2Transform(parameters, idxStart);
break;
case "LogBM25F2":
transFunc = new LogBM25F2Transform(parameters, idxStart);
break;
default:
throw new Exception("un-handled input transformation " + funcName);
}
return transFunc;
}
public LogBM25F2Transform(string[] parameters, int idxStart)
{
//(1) parsing the LogBM25F2 section of the model configuration file
for (int i = idxStart; i < parameters.Length; i++)
{
string[] fields = parameters[i].Split('=');
string name = fields[0];
if (string.Compare(name, "Slope", true) == 0)
{
this.dblSlope = double.Parse(fields[1]);
}
else if (string.Compare(name, "Multiplier", true) == 0)
{
this.dblMultiplier = double.Parse(fields[1]);
}
else if (string.Compare(name, "Intercept", true) == 0)
{
this.dblIntercept = double.Parse(fields[1]);
}
}
this.bm25F2Transform = new BM25F2Transform(parameters, idxStart);
}
public LogBM25F2Transform(LogBM25F2Transform logbm25F2Transform)
{
this.dblSlope = logbm25F2Transform.dblSlope;
this.dblMultiplier = logbm25F2Transform.dblMultiplier;
this.dblIntercept = logbm25F2Transform.dblIntercept;
this.bm25F2Transform = new BM25F2Transform(logbm25F2Transform.bm25F2Transform);
}
public BM25F2Transform(BM25F2Transform bm25F2Transform)
{
this.dblSaturation = bm25F2Transform.dblSaturation;
this.bm25Streams = bm25F2Transform.bm25Streams; ;
this.featureTbl = bm25F2Transform.featureTbl; ;
}