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MathGroup Archive 2004

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Re: Null entry in a Graphics list?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51818] Re: Null entry in a Graphics list?
  • From: David Bailey <dave at Remove_Thisdbailey.co.uk>
  • Date: Wed, 3 Nov 2004 01:23:37 -0500 (EST)
  • References: <cm7chn$lea$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

AES/newspost wrote:
> Is there a "Null" or a "None" for Graphics?
> 
> If I want to accomplish something like
> 
>     g1 = Graphics[---];
>     g2 = Graphics[---]
>     g3 = If[test, Graphics[---], NoGraphics ];
>     
>     Show[g1, g2, g3 ];
> 
> is there something I can put in for "NoGraphics" (other than an 
> offscreen Point or a zero-size Point or . . . ) that will be acceptable 
> in subsequent graphics commands
> 
Hi,

Simply using Graphics[{}] seems to work fine.

I was not sure if Mathematica would 'like' a graphical object like that 
which contains absolutely nothing on which to determine a scale - but it 
seems to understand!

David Bailey


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