public RateEntities GetAverageList(int days)
{
int idx = 0, n = 0;
var ret = new RateEntities("AV{1}_{0}".Fmt(Id, days));
//var dates = GetDates();
decimal sum = 0;
for (int i = 0; i < Count; i++)
{
int j = i - days;
if (j >= 0)
{
var cur = this[j];
sum -= cur.Rate;
n--;
}
var entity = this[i];
var item = (RateEntity)entity.Clone();
sum += entity.Rate;
if (n < days)
{
n++;
}
item.Rate = sum / n;
ret.Add(item);
}
ret.DateSort();
return(ret);
}
public RateEntities GetDiffList()
{
var ret = new RateEntities("D_{0}".Fmt(Id));
//var dates = GetDates();
RateEntity prev = null;
//foreach (DateTime date in dates)
for (int i = 0; i < this.Count; i++)
{
var cur = this[i];
RateEntity item = (RateEntity)cur.Clone();
item.Rate = prev == null ? 0 : cur.Rate - prev.Rate;
ret.Add(item);
prev = cur;
}
ret.DateSort();
return(ret);
}