home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Games of Daze
/
Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso
/
x2ftp
/
msdos
/
math
/
nrpas13
/
expdev.dem
< prev
next >
Wrap
Text File
|
1991-04-29
|
1KB
|
47 lines
PROGRAM d7r5 (input,output);
(* driver for routine EXPDEV *)
CONST
npts=1000;
ee=2.718281828;
VAR
i,idum,j : integer;
expect,total,y : real;
trig,x : ARRAY [0..20] OF real;
glinext,glinextp : integer;
glma : ARRAY [1..55] OF real;
(*$I MODFILE.PAS *)
(*$I RAN3.PAS *)
(*$I EXPDEV.PAS *)
BEGIN
FOR i := 0 to 20 DO BEGIN
trig[i] := i/20.0;
x[i] := 0.0
END;
idum := -1;
FOR i := 1 to npts DO BEGIN
y := expdev(idum);
FOR j := 1 to 20 DO BEGIN
IF ((y < trig[j]) AND (y > trig[j-1])) THEN BEGIN
x[j] := x[j]+1.0
END
END
END;
total := 0.0;
FOR i := 1 to 20 DO BEGIN
total := total+x[i]
END;
writeln;
writeln ('exponential distribution with',npts:7,' points');
writeln (' interval',' observed',' expected');
writeln;
FOR i := 1 to 20 DO BEGIN
x[i] := x[i]/total;
expect := exp(-(trig[i-1]+trig[i])/2.0);
expect := expect*0.05*ee/(ee-1);
writeln (trig[i-1]:6:2,trig[i]:6:2,x[i]:12:6,expect:12:6)
END
END.