Naaaaah, all you need is to use as a seed my mood <gr>
Manuel
Ben Johansen wrote:
> Hi
>
> The Random function in R:Base is doing the same function as all other
> languages I have worked in.
> The function was designed to created repeatable random number sequences. I
> guess they were using it for testing purposes.
>
> So to say that this is a bug, in my opinion is incorrect.
> Although my view is like yours in that it should create a non-repeatable
> sequence.
> I realized the only way for this to happen is to have a plugin card that
> measured
> the following.
> 1. the azimuth of the moon
> 2. the relative humidity
> 3. your mood
> 4. the price of tea in china
> 5. the velocity of the wind generated by that butterfly in Africa
> 6. the rpm of you cpu fan
> and then factor them into a seed (a number between 0 and 1)
>
> This is the only way to get true random, but the cost of developing the card
> was
> to much. so I just use the seconds / minutes and the random function to get
> a somewhat
> random sequence
>
> Ben Johansen
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
> Behalf Of Manuel de Aguiar
> Sent: Monday, April 23, 2001 11:20 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Randomly generated unique numbers - Razzak's Reply
>
> Hello Jouke,
>
> Did you get the same result as I did on your computer when you type:
> set var vrand = (random(1000))
> and repeating this process?
> I performed this test on a W98 and a W95 computer with identical results.
> It
> could be that It only happens on the two test computers I used and that is
> why
> RDCC would check this issue.
>
> The whole purpose of having a function that generates a random number is so
> that
> you do not have to go through convolutions to get a random number. The
> technique of using a date or time component to change the seed value of the
> random number generator is something that the programmer of the random
> function
> should have used so that when anyone using the random number generator
> function
> would correctly generate a random number.
> If you create a random number function that generate predictable numbers, it
> is
> NOT a random number generator function. The test I performed repeated the
> numbers EXACTLY every time you enter RBase.
> For a user to have to add a seed value to a supposedly random number
> generator
> function is at best a workaround for a defective function.
> Manuel
>
> Jouke Hendrik de Vries wrote:
>
> > Why is this seen as a BUG?
> > There is not a single product on the market who remembers earlier values
> > after the database has been closed and connected again.
> > The only possible way is to load every obtained value in a table (single
> > column) that does not accept duplicates.
> > (RANDOM(1000)) continues until a value is accepted
> >
> > SET ERR VAR verr
> > WHILE #date IS NOT NULL THEN
> > SET VAR vtest = (RANDOM(1000)
> > LOAD RANDOMTAB
> > .vtest
> > END
> > IF verr = 0 THE
> > BREAK
> > ENDI
> > ENDW
> >
> > Another method is to use RANDOM in conjunction with values extracted from
> > DATE and TIME variables, but even then you cannot quarantee a unique
> result.
> >
> > Jouke
> >
> > ----- Original Message -----
> > From: Manuel de Aguiar <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Monday, April 23, 2001 6:51 PM
> > Subject: Re: Randomly generated unique numbers - Razzak's Reply
> >
> > > Hello Rich,
> > > I think you just found a bug.
> > > Using RBase for Windows V6.5++ Build: 1.840gxRT03 I tried your command
> > line
> > > verbatim seven time and got the following number:
> > > 10
> > > 3
> > > 335
> > > 33
> > > 355
> > > 217
> > > 536
> > > I then exit RBase, open RBase again SIX TIMES and got the same numbers.
> > Since
> > > you discover it, please report it to RDCC so that the Dream Team can
> > correct
> > > this problem.
> > > Thank you,
> > > Manuel de Aguiar
> > > M|D Enterprises
> > >
> > > rich wrote:
> > >
> > > > One item to watch out for:
> > > > 1. If you set a variable to a random number like: set var vrand =
> > > > (random(1000)) it will generate a number.
> > > > 2. if you exit rbase and restart it, define the variable again you
> will
> > get
> > > > the same random number.
> > > >
> > > > rich
> > > > ----- Original Message -----
> > > > From: "A. Razzak Memon" <[EMAIL PROTECTED]>
> > > > To: <[EMAIL PROTECTED]>
> > > > Sent: Monday, April 23, 2001 10:35 AM
> > > > Subject: Re: Randomly generated unique numbers - Razzak's Reply
> > > >
> > > > >
> > > > > Bob,
> > > > >
> > > > > Use the R:BASE (RANDOM(value)) Function!
> > > > >
> > > > > http://www.RSyntax.com
> > > > >
> > > > > Enjoy!
> > > > >
> > > > > Very Best Regards,
> > > > >
> > > > > Razzak.
> > > > >
> > > > > At 10:05 AM 4/23/2001 -0400, Bob Powell wrote:
> > > > > >
> > > > > >Does anyone know how to randomly generate a nine
> > > > > >digit number that is always unique?
> > > > >
> > > > >
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