public void Calculate(ReportGrouping grouping, double discountRatePerYear)
{
// The underlying data is always monthly
var discountRate = grouping == ReportGrouping.Yearly ? discountRatePerYear : Financial.ConvertDiscountRateYearToMonth(discountRatePerYear);
if (CalculateNpv)
{
Npv = (decimal)Financials.Npv.Calculate(_cashFlows, discountRate);
}
if (CalculateIrr)
{
var irr = Financials.Irr.Calculate(_cashFlows, discountRate);
Irr = double.IsNaN(irr) ? 0m : (decimal)irr;
}
// If we ask for yearly, convert the resulting IRR
if (grouping == ReportGrouping.Monthly)
{
Irr = Financial.ConvertDiscountRateMonthToYear(Irr);
}
}