protected internal override double Evaluate(double[] values)
{
if (values.Length < 1)
{
throw new EvaluationException(ErrorEval.DIV_ZERO);
}
return(StatsLib.varp(values));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0,
ValueEval arg1)
{
double dn;
try
{
ValueEval ve1 = OperandResolver.GetSingleValue(arg1, srcRowIndex, srcColumnIndex);
dn = OperandResolver.CoerceValueToDouble(ve1);
}
catch (EvaluationException e1)
{
// all errors in the second arg translate to #VALUE!
return(ErrorEval.VALUE_INVALID);
}
if (dn < 0 || dn > 1)
{ // has to be percentage
return(ErrorEval.NUM_ERROR);
}
double result;
try
{
double[] ds = NPOI.SS.Formula.Functions.AggregateFunction.ValueCollector.CollectValues(arg0);
int N = ds.Length;
if (N == 0 || N > 8191)
{
return(ErrorEval.NUM_ERROR);
}
double n = (N - 1) * dn + 1;
if (n == 1d)
{
result = StatsLib.kthSmallest(ds, 1);
}
else if (n == N)
{
result = StatsLib.kthLargest(ds, 1);
}
else
{
int k = (int)n;
double d = n - k;
result = StatsLib.kthSmallest(ds, k) + d
* (StatsLib.kthSmallest(ds, k + 1) - StatsLib.kthSmallest(ds, k));
}
NumericFunction.CheckValue(result);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
return(new NumberEval(result));
}
public ValueEval Evaluate(ValueEval[] args, OperationEvaluationContext ec)
{
var values = ValueCollector.CollectValues(args);
if (values.Length < 1)
{
throw new EvaluationException(ErrorEval.DIV_ZERO);
}
return(new NumberEval(StatsLib.stdevp(values)));
}
protected internal override double Evaluate(double[] ops)
{
if (ops.Length < 2)
{
throw new EvaluationException(ErrorEval.NUM_ERROR);
}
double[] values = new double[ops.Length - 1];
int k = (int)ops[ops.Length - 1];
System.Array.Copy(ops, 0, values, 0, values.Length);
return(StatsLib.kthLargest(values, k));
}
public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0,
ValueEval arg1)
{
double dn;
try
{
ValueEval ve1 = OperandResolver.GetSingleValue(arg1, srcRowIndex, srcColumnIndex);
dn = OperandResolver.CoerceValueToDouble(ve1);
}
catch (EvaluationException e1)
{
// all errors in the second arg translate to #VALUE!
return(ErrorEval.VALUE_INVALID);
}
// weird Excel behaviour on second arg
if (dn < 1.0)
{
// values between 0.0 and 1.0 result in #NUM!
return(ErrorEval.NUM_ERROR);
}
// all other values are rounded up to the next integer
int k = (int)Math.Ceiling(dn);
double result;
try
{
double[] ds = NPOI.SS.Formula.Functions.AggregateFunction.ValueCollector.CollectValues(arg0);
if (k > ds.Length)
{
return(ErrorEval.NUM_ERROR);
}
result = _isLarge ? StatsLib.kthLargest(ds, k) : StatsLib.kthSmallest(ds, k);
NumericFunction.CheckValue(result);
}
catch (EvaluationException e)
{
return(e.GetErrorEval());
}
return(new NumberEval(result));
}
protected internal override double Evaluate(double[] values)
{
return(StatsLib.median(values));
}