public virtual SvmNode[] GetSvmNode(ItemRating rating)
{
var svmNode = new SvmNode[2] {
new SvmNode(Mapper.ToInternalID(rating.User.Id), 1),
new SvmNode(Mapper.ToInternalID(rating.Item.Id + rating.Domain.Id), 1)
};
return(svmNode);
}
public static SvmNode[] ToSvmNodes(this double[] vector)
{
var result = new SvmNode[vector.Length];
for (int i = 0; i < vector.Length; i++)
{
result[i] = new SvmNode(i, vector[i]);
}
return(result);
}
public override LibSvm.SvmNode[] GetSvmNode(ItemRating rating)
{
int followersCount = _container.Tweets[rating].FollowersCount;
double followersFeature = followersCount > 1000 ? 1.0 : (double)followersCount / 1000;
int friendsCount = _container.Tweets[rating].FriendsCount;
double friendsFeature = friendsCount > 1000 ? 1.0 : (double)friendsCount / 1000;
var svmNode = new SvmNode[6] {
//new SvmNode(Mapper.ToInternalID("RetweetCount"), _container.Tweets[rating].RetweetCount),
new SvmNode(Mapper.ToInternalID("Rating"), rating.Rating),
new SvmNode(Mapper.ToInternalID("FollowersCount"), followersFeature),
new SvmNode(Mapper.ToInternalID("FriendsCount"), friendsFeature),
new SvmNode(Mapper.ToInternalID(rating.User.Id), 1),
new SvmNode(Mapper.ToInternalID(rating.Item.Id + rating.Domain.Id), 1),
new SvmNode(Mapper.ToInternalID(_container.Tweets[rating].MovieUrl), 1),
};
return(svmNode);
}
