// Pulls all newer ratings from the RatingSummarizer
public void Update(ExponentialRatingSummarizer summarizer)
{
DateTime latestDate = summarizer.LatestKnownDate;
// fetch any ratings that appeared since our last update
this.Update(summarizer, this.endDate, latestDate);
}
// Pulls new ratings from the RatingSummarizer within a certain date range and updates metadata (min/max)
public void Update(ExponentialRatingSummarizer summarizer, DateTime earliestDateToInclude, DateTime latestDateToInclude)
{
if (!this.useNonzeroWeightEvenIfEarlierThanFirstSummarizerDatapoint)
{
bool earlierThanFirstDatapoint = this.startDate.CompareTo(summarizer.EarliestKnownDate) < 0;
if (earlierThanFirstDatapoint)
{
return;
}
}
if (earliestDateToInclude.CompareTo(this.startDate) < 0)
{
bool endInclusive = (this.values.Weight <= 0);
this.importData(summarizer, earliestDateToInclude, this.startDate, true, endInclusive);
this.startDate = earliestDateToInclude;
}
bool startInclusive = (this.values.Weight <= 0);
int endComparison = latestDateToInclude.CompareTo(this.endDate);
if (endComparison > 0 || (startInclusive && endComparison >= 0))
{
this.importData(summarizer, this.endDate, latestDateToInclude, startInclusive, true);
this.endDate = latestDateToInclude;
}
this.timeWeight = 1 - (summarizer.GetWeightAfterDate(this.endDate) / summarizer.GetWeightAfterDate(this.startDate));
}
// implements the pull of new data from the RatingSummarizer
private void importData(ExponentialRatingSummarizer summarizer, DateTime earliestDateToInclude, DateTime latestDateToInclude, bool startInclusive, bool endInclusive)
{
this.values = this.values.Plus(summarizer.GetValueDistributionForDates(earliestDateToInclude, latestDateToInclude, startInclusive, endInclusive));
}
public LongtermValuePredictor(ExponentialRatingSummarizer ratingSummarizer)
{
this.ratingSummarizer = ratingSummarizer;
this.interpolator = new LazyDimension_Interpolator <Distribution>(new DistributionAdder());
this.ratingSummariesToUpdate = new List <ScoreSummary>();
}
