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MathGroup Archive 2007

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Re: Create random binary images

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83669] Re: Create random binary images
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Wed, 28 Nov 2007 05:25:28 -0500 (EST)
  • Organization: The Open University, Milton Keynes, UK
  • References: <figtob$f90$1@smc.vnet.net>

Tara.Ann.Lorenz at gmail.com wrote:

> I am trying to create several random binary images of 30x30.  I want
> the outputs to be 1's and 0's, with 5% of the outputs being 1's.  Any
> ideas on how to code this in Mathematica?

One possible way is to use *RandomChoice* with a list of weights 
associated to your values. For instance,

data = RandomChoice[{0.95, 0.05} -> {0, 1}, {30, 30}];

ArrayPlot[data]

Regards,
-- 
Jean-Marc


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