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MathGroup Archive 2005

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Re: Matrix question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60306] Re: Matrix question
  • From: David Bailey <dave at Remove_Thisdbailey.co.uk>
  • Date: Sat, 10 Sep 2005 22:36:26 -0400 (EDT)
  • References: <dfudth$1qo$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

sandog wrote:
> i want to create a NxN matrix with zeros but i want a percentage of the matrix spots to be one at random spots any idea? cause i have no clue how to do that.
> Any help appreciated thx .
> 
Hello,

This will make a 10x10 array with a probability of 0.3 that each point 
will be a 1

Array[If[Random[]>0.7,1,0]&,{10,10}]

David Bailey
http://www.dbaileyconsultancy.co.uk


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