function MeanT(const Data: TVec; Alpha: Double): Double;
Trimmed mean.
| # | Name | Description |
|---|---|---|
| 1 | Data | Data. An exception is raised if Data vector is complex. |
| 2 | Alpha | Defines the percent of value excluded from mean calculation. If Alpha parameter is omitted, the default value 0.05 is used (meaning highest 2.5% and lowest 2.5% of data will be excluded). Alpha paramater must lie on the interval [0,1) otherwise an exception is raised. |
Returns: Double - the mean of all Data vector elements, excluding highest and lowest 100*Alpha/2 percents of value.
Examples
Uses MtxExpr, Statistics, Math387;
procedure Example;
var a: Vector;
MT : double;
begin
a.SetIt(false,[1, 2, 97, 98, 99, 100, 190]);
MT := MeanT(a,0.5); // MT = 79.2
end;See Also: Statistics.MeanH, Statistics.MeanG