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Re: random integers between 0 and 1,000,000 [message #46047 is a reply to message #45956]

Mon, 24 October 2005 12:06

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Norbert Hahn wrote:
> "James Kuyper" <kuyper@wizard.net> wrote:
>
>> takes a 32 bit unsigned long with a value somewhere in the range from 0
>> to 1000000, and converts it into a 16 bit signed int, with a range from
>> -32768 to 32767.
>
> I took a closer look on what might have gone on. I ran the following
> program:
>
> z = randomu(seed,30)
> a = long (z*1000000) & print, a
> b = ulong (z*1000000) & print, b
> i = fix(a)
> print, a
>
> I found that a(1) was negative (-20848). So I printed

I was unable to reproduce that result. I tested with several million
random numbers, and never once got a negative value from
long(1000000*randomu(seed,N)). Could you identify the value of z[1]
that gave you that value for a[1]?

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[Message index]

		Re: random integers between 0 and 1,000,000 By: Norbert Hahn on Mon, 24 October 2005 09:38
		Re: random integers between 0 and 1,000,000 By: Norbert Hahn on Mon, 24 October 2005 09:36
		Re: random integers between 0 and 1,000,000 By: James Kuyper on Mon, 24 October 2005 07:04
		Re: random integers between 0 and 1,000,000 By: peter.albert@gmx.de on Mon, 24 October 2005 06:23
		Re: random integers between 0 and 1,000,000 By: Norbert Hahn on Mon, 24 October 2005 01:59
		Re: random integers between 0 and 1,000,000 By: peter.albert@gmx.de on Sun, 23 October 2005 23:12
		Re: random integers between 0 and 1,000,000 By: steven.leopardi on Sat, 22 October 2005 19:44
		Re: random integers between 0 and 1,000,000 By: James Kuyper on Mon, 24 October 2005 12:06

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