private static void ExtractFeatureInformation(object featuredObject, int iiLen, int oiLen, out FeatureDescription[] descriptions, out Strings inIDs, out Strings outIDs)
{
var ofo = featuredObject as IFeaturedInputOutput;
if (ofo != null)
{
inIDs = ofo.InputFeatureIDs;
outIDs = ofo.OutputFeatureIDs;
descriptions = ofo.FeatureDescriptions.ToArray();
return;
}
var ifo = featuredObject as IFeaturedInput;
if (ifo != null)
{
inIDs = ifo.InputFeatureIDs;
var set = ifo.FeatureDescriptions; // Mutable.
outIDs = GenerateFeatureDescriptions(set, oiLen);
descriptions = set.ToArray();
return;
}
var newSet = new FeatureDescriptionSet();
inIDs = GenerateFeatureDescriptions(newSet, iiLen);
outIDs = GenerateFeatureDescriptions(newSet, oiLen);
descriptions = newSet.ToArray();
}
private void Initialize()
{
var set = new FeatureDescriptionSet(desc);
FeatureDescriptionSet inputSet = null;
FeatureDescriptionSet outputSet = null;
try
{
inputSet = set.GetSubset(InputFeatureIDs);
outputSet = set.GetSubset(OutputFeatureIDs);
}
catch (Exception ex)
{
throw new InvalidOperationException("Cannot generate feature subset. See inner exception for details.", ex);
}
inputVectorizer = new FeatureSetVectorizer(inputSet);
outputVectorizer = new FeatureSetVectorizer(outputSet);
if (inputVectorizer.FeatureDescriptions.Sum(d => d.FeatureValueCount) != Unit.InputInterface.Length)
{
throw new InvalidOperationException("Invalid number of input features.");
}
if (outputVectorizer.FeatureDescriptions.Sum(d => d.FeatureValueCount) != Unit.OutputInterface.Length)
{
throw new InvalidOperationException("Invalid number of output features.");
}
inputIDLookup = CreateLookup(InputFeatureIDs);
if (InputFeatureIDs.Count + OutputFeatureIDs.Count < set.Count)
{
desc = Cut(set, InputFeatureIDs.Concat(OutputFeatureIDs));
}
computation = new Learningutation<double>(NumberOfIterations);
}
private FeatureDescription[] Cut(FeatureDescriptionSet set, IEnumerable<string> exceptIDs)
{
return exceptIDs.Select(id => set[id]).ToArray();
}
private static Strings GenerateFeatureDescriptions(FeatureDescriptionSet set, int count)
{
string[] ids = new string[count];
for (int idx = 0; idx < count; idx++)
{
string fid = "Port_" + idx;
ids[idx] = fid;
set.Add(new ValueFeatureDescription(fid, new DoubleRange(0.0, 1.0)));
}
return new Strings(ids);
}
