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From: Stig Brautaset <stig@brautaset.org>
To: Uwe Brauer <oub@mat.ucm.es>, emacs-orgmode@gnu.org
Subject: Re: org table: one column of random numbers (but natural ones)
Date: Thu, 28 May 2020 21:26:02 +0100	[thread overview]
Message-ID: <m2wo4vvmat.fsf@Margil.fritz.box> (raw)
In-Reply-To: <87lflbhq7a.fsf@mat.ucm.es>

>    > In row 67 you would have a random integer in the range [0..67)
>    > f0 format removes any fractional part leaving only an integer number
>
> Aha thanks, a minor thing, which I thank, cannot be really done:
>
> Is it possible to avoid number repetition?
>
> So I want a random sequence of the column 67 but I don't want numbers to
> be repeated.

To avoid duplicates you could generate a sequence from [0..67), shuffle
it[1], then use the row number as an index into that list. (Or pop off the
front.) How to do that from an org table function I have no idea,
however.

[1]: Emacs lisp "Knuth shuffle" implementation: https://stackoverflow.com/a/49505968/5950

Regards,
Stig



  reply	other threads:[~2020-05-28 20:27 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-27 20:40 org table: one column of random numbers (but natural ones) Uwe Brauer
2020-05-28  6:06 ` tbanelwebmin
2020-05-28 18:25   ` Uwe Brauer
2020-05-28 20:26     ` Stig Brautaset [this message]
2020-05-29 11:19       ` [random sorting] (was: org table: one column of random numbers (but natural ones)) Uwe Brauer
2020-05-29 11:43         ` [random sorting] Eric S Fraga
2020-05-29 16:52         ` [random sorting] (was: org table: one column of random numbers (but natural ones)) Stig Brautaset
2020-05-28  7:54 ` org table: one column of random numbers (but natural ones) Eric S Fraga
2020-05-28  7:56 ` Eric S Fraga

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