Randomization Issues

[BlueScreen]

Hey Guys...

Wanted to know if there is a way to perform randomization to single numbers.

I'll explain.

$Res=Random(1,100)

This will perform a randomization between 1 to 100.

What should I do in order to perform a randomization between 323, 560, 23, etc?

10x

[Jos]

You means randomly pick a value from your list?

$i="323, 560, 23,40" 
$ir = StringSplit($i,",")
msgbox(4096,"Predefined Random","Your number is:" & $ir[round(Random(.5,ubound($ir)-1)+.5)])

Edited February 25, 2004 by JdeB

[BlueScreen]

10x JdeB,

What is this .5?

[Jos]

10x JdeB,

What is this .5?

Good that you ask... since I made a mistake in the logic...(see below update

here how it works:

- ubound($ir) returns 5 in this case so need to subtract 1

- Random(.5, 4 + .49)-> will result in a random number between .5 - 4.49

- the round function will round:

0.5 - 1.49 -> 1

1.5 - 2.49 -> 2

2.5 - 3.49 -> 3

3.5 - 4.49 -> 4

- so $ir[$rn] retruns one of the array values.

Does that make sense ?

$i="323, 560, 23,40" 
$ir = StringSplit($i,",")
$rn = Random(.5,ubound($ir)-1 + .49)
$rn = Round($rn)
$rn = $ir[$rn]
msgbox(4096,"Predefined Random","You number is:" & $rn)

[BlueScreen]

Great! That's exactly what I needed!

10x again JdeB

[Nutster]

It is easier on the user and the system to use Int.

$i="323, 560, 23,40"
$ir = StringSplit($i,",");$ir[0] contains the number of strings extracted.
; Argument of Random is the number of values to choose from. (4)
; The 1 being added is the starting valid value.
$rn = Int(Random($ir[0]))+1 
$rn = $ir[$rn]
MsgBox(4096, "Predefined Random", "You number is:" & $rn)

This is my prefered method of using Random; from the guy who wrote the random function.

Yeah, there is a bug in the two-argument version for Random , but the 1 and 0 argument versions are working fine.

Edit: I spoke (wrote?) too soon. Jon has installed the fix for Random in the current unstable version. Thanks, Jon.

Edited February 25, 2004 by Nutster

[Jos]

It is easier on the user and the system to use Int.

$rn = Int(Random($ir[0]))+1

good to know this also works ..... make it easier to code.. Edited February 25, 2004 by JdeB

[CyberSlug]

What is the final word on what the docs should say?