public ValueEval Evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
{
int nArgs = args.Length;
if (nArgs < 2)
{
return(ErrorEval.VALUE_INVALID);
}
try
{
double rate = NumericFunction.SingleOperandEvaluate(args[0], srcRowIndex, srcColumnIndex);
// convert tail arguments into an array of doubles
ValueEval[] vargs = new ValueEval[args.Length - 1];
Array.Copy(args, 1, vargs, 0, vargs.Length);
double[] values = AggregateFunction.ValueCollector.CollectValues(vargs);
double result = FinanceLib.npv(rate, values);
NumericFunction.CheckValue(result);
return(new NumberEval(result));
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
}
public override double Evaluate(double rate, double arg1, double arg2, double arg3, bool type)
{
return(FinanceLib.nper(rate, arg1, arg2, arg3, type));
}