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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: [mg51809] Re: [mg51795] Null entry in a Graphics list?
  • From: "Ingolf Dahl" <ingolf.dahl at telia.com>
  • Date: Wed, 3 Nov 2004 01:23:21 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Replace NoGraphics with  Sequence[]

Ingolf Dahl
Sweden

>-----Original Message-----
>From: AES/newspost [mailto:siegman at stanford.edu]
To: mathgroup at smc.vnet.net
>Sent: Tuesday, November 02, 2004 08:05
>To: mathgroup at smc.vnet.net
>Subject: [mg51809] [mg51795] Null entry in a Graphics list?
>
>
>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
>


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