public override void Setup()
{
if (SetupParameters.ContainsKey("dim"))
{
SetupParameters["dim"] = SetupParameters["dim"].Replace('-', ',');
}
if (SetupParameters.ContainsKey("regular"))
{
SetupParameters["regular"] = SetupParameters["regular"].Replace('-', ',');
}
if (!SetupParameters.ContainsKey("libFmPath"))
{
SetupParameters["libFmPath"] = "libfm.net.exe";
}
LibFmArguments = SetupParameters.Where(kv => kv.Key.ToLower() != "libfmpath")
.ToDictionary(kv => "-" + kv.Key, kv => kv.Value)
.SelectMany(kv => new string[] { kv.Key, kv.Value }).ToList();
if (!SetupParameters.ContainsKey("save_model"))
{
LibFmArguments.Add("-save_model train.model");
}
// default data type
DataType = DataType.Ratings;
FeatureBuilder = new FmFeatureBuilder();
}
public override void Setup()
{
try
{
// build recommender object
Type mmlRecommenderType = Helpers.ResolveType(SetupParameters["ml-class"]);
MmlRecommenderInstance = (IRecommender)mmlRecommenderType.GetConstructor(Type.EmptyTypes).Invoke(null);
if (typeof(ITimeAwareRatingPredictor).IsAssignableFrom(mmlRecommenderType))
{
DataType = DataType.TimeAwareRating;
}
else if (typeof(IRatingPredictor).IsAssignableFrom(mmlRecommenderType))
{
DataType = DataType.Ratings;
}
else if (typeof(ItemRecommender).IsAssignableFrom(mmlRecommenderType))
{
DataType = DataType.PosFeedback;
}
else
{
throw new WrapRecException(string.Format("Unknown MmlRecommender class: {0}", SetupParameters["ml-class"]));
}
// Set properties
foreach (var param in SetupParameters.Where(kv => kv.Key != "ml-class" && kv.Key != "numGroups" && kv.Key != "ingoreFeatures"))
{
PropertyInfo pi = MmlRecommenderInstance.GetType().GetProperty(param.Key);
// in case the value of attribute is empty ignore
// empty attributes are only used for logging purposes
if (string.IsNullOrEmpty(param.Value))
{
continue;
}
object paramVal;
if (pi.PropertyType.IsEnum)
{
paramVal = Enum.Parse(pi.PropertyType, param.Value);
}
else
{
paramVal = param.Value;
}
pi.SetValue(MmlRecommenderInstance, Convert.ChangeType(paramVal, pi.PropertyType));
}
}
catch (Exception ex)
{
throw new WrapRecException(string.Format("Cannot resolve MmlRecommender: {0}\n{1}", ex.Message, ex.StackTrace));
}
}
public override Dictionary <string, string> GetModelParameters()
{
return(SetupParameters.Where(kv => kv.Key.ToLower() != "libfmpath").ToDictionary(kv => kv.Key, kv => kv.Value));
}