Statistics.MeanT Function

Trimmed mean.

Pascal

function MeanT(const Data: TVec; Alpha: double = 0.05): double;

File

Statistics

Parameters

Parameters	Description
Data	Data. An exception is raised if Data vector is complex.
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

the mean of all Data vector elements, excluding highest and lowest 100*Alpha/2 percents of value.

See Also

MeanH, MeanG

Example

Calculate mean for given values, excluding top and bottom 25% i.e 50%.

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;

#include "MtxExpr.hpp"
#include "Statistics.hpp"
void __fastcall Example()
{
  sVector a;
  a.SetIt(false, OPENARRAY(double,(1, 2, 97, 98, 99, 100, 190)));
  double MT = MeanT(a,0.5);
  // MT = 79.2
}

Statistics, Functions, Example, See Also

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