public Update(string tableName, T values)
{
_tableName = tableName;
_values = ConvertToDictionary.ConvertTo <T>(values);
_criterions = new List <Criterion>();
_excludeField = new List <ExcludeField>();
}
public static void Run(double threshhold, int targetUser, IDistance iDistance, Dictionary <int, double[, ]> dataSet, int K)
{
neighbors = new Dictionary <int, double>();
var userRatings = dataSet[targetUser];
Dictionary <int, List <Tuple <int, double> > > convertedDataSet = ConvertToDictionary.ConvertData(dataSet);
foreach (var userID in dataSet.Keys)
{
if (userID != targetUser)
{
double similarity = iDistance.ComputeDistance(userRatings, dataSet[userID]);
if (similarity > threshhold)
{
if (hasMoreProductRated(targetUser, userID, convertedDataSet))
{
neighbors.Add(userID, similarity);
}
}
}
}
var sorted = neighbors.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value).Take(K);
// var sorted = from pair in neighbors
// orderby pair.Value descending
// select pair;
foreach (var neighbor in sorted)
{
Console.WriteLine("Neighbor id:" + neighbor.Key + ", similarity " + neighbor.Value);
}
}
private IList <ExcludeField> _excludeField; //不需要更新的字段
public Update(string tableName, T values, IList <Criterion> criterions, SqlOperator sqlOperator, IList <ExcludeField> excludeField)
{
_tableName = tableName;
_values = ConvertToDictionary.ConvertTo <T>(values);
_criterions = criterions;
_sqlOperator = sqlOperator;
_excludeField = excludeField;
}
public void AddValues(T values)
{
_values = ConvertToDictionary.ConvertTo <T>(values);
}
public Insert(string tableName, T values)
{
_tableName = tableName;
_values = ConvertToDictionary.ConvertTo <T>(values);
_excludeField = new List <ExcludeField>();
}