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MathGroup Archive 2001

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Re: Rearrangement of a sequence into random order

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28450] Re: [mg28434] Rearrangement of a sequence into random order
  • From: Tomas Garza <tgarza01 at prodigy.net.mx>
  • Date: Thu, 19 Apr 2001 03:26:39 -0400 (EDT)
  • References: <200104180723.DAA17248@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

The add-on package DiscreteMath`Permutations` provides what you need. E.g.,


In[1]:=
Needs["DiscreteMath`Permutations`"]
In[2]:=
RandomPermutation[20]
Out[15]=
{10, 20, 9, 13, 6, 1, 16, 2, 12, 3, 18, 7, 19, 14, 11, 4, 15, 17, 8, 5}

Tomas Garza
Mexico City

----- Original Message -----
From: "Loren Dill" <lorendill at mediaone.net>
To: mathgroup at smc.vnet.net
Subject: [mg28450] [mg28434] Rearrangement of a sequence into random order


> Hi,
>
> I'm a math teacher, and need to prepare exams from time to time.  I
> typically prepare questions for the exam in a sequential order starting at
> the beginning of the material and going to the end.  I may have something
> like 20 short-answer questions.  I want a program that will randomize the
> order of the questions.  In other words, I want to provide n, the number
of
> questions, and have the program provide a list of length n that contains
all
> the numbers from 1 to n in a random order without any number being
repeated
> or omitted.  I'm sure that this is an easy task for Mathematica, but I
can't
> figure out the best way to do it.
>
> Loren Dill
>
>



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