private void buildWorkingSet(DateTime start_, DateTime end_)
{
var days = All.ToDays(DoubleCollationType.Sum).GetSubValues(start_, end_);
m_daily = new DataSeries(days.Dates, days.Data, Period.Daily, m_dataType);
var weeks = m_daily.ToWeeks(DoubleCollationType.Sum);
m_weekly = new DataSeries(weeks.Dates, weeks.Data, Period.Weekly, m_dataType);
var months = m_daily.ToMonths(DoubleCollationType.Sum);
m_monthly = new DataSeries(months.Dates, months.Data, Period.Monthly, m_dataType);
var years = months.ToYears(DoubleCollationType.Sum);
m_yearly = new DataSeries(years.Dates, years.Data, Period.Yearly, m_dataType);
}