Another technique would be to use a rng with a range of say a billion numbers and assign them in order to each of the 10,000 numbers (the same as most previous suggestions) and then sort. The advantage would fewer duplicates (if you think that might affect randomness).
I've needed similar techniques to generate data to test binary search algorithm performance against hash search algorithm performance. The randomness of the order of the input data caused some cache line thrashing in the binary search which we felt was more realistic than just feeding the data in order. For hash searches of course the order makes no difference. But duplicates were not a problem for this problem. In another way of looking at it, you are testing how well you shuffled a deck of 10,000 (instead of 52) cards. According to theory, for a 52-card deck 7 cut and riffle shuffles have been considered sufficient for most card games. But since you aren't simulating cut and riffle shuffles, proving that your order of numbers is random really relies on proving that your rng actually produces random numbers. This is a very non-trivial task. In my prior research I learned that some commonly used rng algorithms have serious flaws that were only discovered years after they'd made it into common usage. Gary Weinhold Senior Application Architect DATAKINETICS | Data Performance & Optimization Phone: +1.613.523.5500 x216<tel:+1.613.523.5500%20x216> Email: weinh...@dkl.com<mailto:weinh...@dkl.com> [http://www.dkl.com/wp-content/uploads/2015/07/dkl_logo.png]<http://www.dkl.com/> Visit us online at www.DKL.com<http://www.dkl.com/> [http://www.dkl.com/wp-content/uploads/2015/08/banner.png]<http://www.dkl.com/mailsig> E-mail Notification: The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system. __________ On 2017-05-16 18:46, Richard Kuebbing wrote: Fantastic. This looks to be the level of brilliance I was looking for - simplicity plus 100% solution. So follow-up question. I have a lot of advanced math in grad school, all inapplicable to this. Is there any kind of measure of how "random" a set of numbers is? Someone internal is bound to ask. I am thinking of graphing the difference [=n(i+1)-n(i)] and looking at distribution. The client(s) are business persons and are unlikely to ask. Question 2: I have a passion for documenting things. Do you wish to have your name attached to this idea? Tomorrow when I have time I will peruse all the answers. Profound thanks Peace be w/y'all -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Farley, Peter x23353 Sent: Tuesday, May 16, 2017 4:51 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU<mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> Subject: Re: random quest 1. Use either CEERAN0 or FUNCTION RANDOM to generate a column of 99,999 random numbers. It's OK if there are duplicates. 2. Add a second column using SORT with sequential numbers from 1 to 99999 (use the SEQNUM option). 3. SORT by the first column only and DO NOT specify the EQUALS option. 4. Use the numbers in column 2 after sorting as your 99,999 randomly ordered numbers You can combine steps 2, 3, and 4 in one SORT execution. INREC to add the SEQNUM's as a second column, SORT by first column, OUTREC to select only the second column for output. HTH Peter -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Richard Kuebbing Sent: Tuesday, May 16, 2017 4:28 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU<mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU> Subject: random quest So I need a set of 99,999 random numbers which are 5 digits and unique, i.e. no duplicates. CEERAN0 and Cobol FUNCTION RANDOM both give sets w/30+% duplicates. I have seen website random.org. Anyone have to ever done this thing? Anyone have suggestions? -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. 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