/// <summary>
/// Gets the top tags.
/// </summary>
public static ICollection <Tag> GetMostUsedTags(this ObjectProvider repository, int itemCount)
{
if (itemCount < 0)
{
throw new ArgumentOutOfRangeException("itemCount", itemCount,
Resources.ArgumentOutOfRange_NegativeTagItemCount);
}
var topTags = repository.GetTopTags(itemCount);
double mean;
double stdDev = topTags.Values.StandardDeviation(out mean);
var tags = new List <Tag>();
foreach (var tag in topTags)
{
var t = new Tag(tag);
t.Factor = (t.Count - mean) / stdDev;
t.Weight = ComputeWeight(t.Factor, stdDev);
tags.Add(t);
}
return(tags);
}