avevar.dem

Delphi Pascal 数据挖掘领域算法包 数值算法大全

PROGRAM d13r4(input,output);
(* driver for routine AVEVAR *)
CONST
   npts=1000;
   eps=0.1;
TYPE
   glnparray = ARRAY [1..npts] OF real;
VAR
   gliset : integer;
   glgset : real;
   glinext,glinextp : integer;
   glma : ARRAY [1..55] OF real;
   i,idum,j : integer;
   ave,shift,vrnce : real;
   data : glnparray;

(*$I MODFILE.PAS *)
(*$I RAN3.PAS *)

(*$I GASDEV.PAS *)

(*$I AVEVAR.PAS *)

BEGIN
(* generate gaussian distributed data *)
   gliset := 0;
   idum := -5;
   writeln('shift':9,'average':11,'variance':12);
   FOR i := 1 to 11 DO BEGIN
      shift := (i-1)*eps;
      FOR j := 1 to npts DO
         data[j] := shift+i*gasdev(idum);
      avevar(data,npts,ave,vrnce);
      writeln(shift:8:2,ave:11:2,vrnce:12:2)
   END
END.