Unique Routine

Summary

Finds the unique elements in vector/matrix.

Declaration

Procedure Unique(Src: TMtxVec; Dst: TVec);

Description

Finds and sorts the unique elements in Src vector/matrix array. Sorted values are returned in Dst vector. An exception is raised if Src is Complex. Length and Complex properties of Dst vector are adjusted automatically.

See Also
Ranks
TiedRanks

Example 1

Collect unique elements from matrix

  Uses MtxExpr, Statistics;
  procedure Example;
  var m1: Matrix;
    uvec: Vector;
  begin
    m1.SetIt(4,3,false,
      [ 1,2,3,
        4,2,1,
        3,2,3,
        3,3,1]);
    Unique(m1,uvec);
    // uvec elements are [1,2,3,4]
  end;

  #include "MtxVecCpp.h"
  #include "Math387.hpp"
  #include "Statistics.hpp"
  void __fastcall Example();
  {
    Matrix m1;
    Vector uvec;
    m1->SetIt(false,OPENARRAY(TSample,(1,2,3,
        4,2,1,
        3,2,3,
        3,3,1)));
    Unique(m1,uvec);
    // uvec elements are [1,2,3,4]
  }

  using Dew.Math;
  using Dew.Stats;
  using Dew.Stats.Units;
  namespace Dew.Examples
  {
    private void Example()
    {
      Matrix m1 = new Matrix(0,0);
      Vector uvec = new Vector(0);
      m1.SetIt(4,3,false, new double[]
      { 1,2,3,
        4,2,1,
        3,2,3,
        3,3,1});
      Statistics.Unique(m1,uvec);
      // uvec elements are [1,2,3,4]
    }
  }