MathGroup Archive: November 2004 [00032]

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Null entry in a Graphics list?

To: mathgroup at smc.vnet.net
Subject: [mg51795] Null entry in a Graphics list?
From: AES/newspost <siegman at stanford.edu>
Date: Tue, 2 Nov 2004 02:05:27 -0500 (EST)
Sender: owner-wri-mathgroup at wolfram.com

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

Follow-Ups:
- Re: Null entry in a Graphics list?
  - From: "Maxim A. Dubinnyi" <maxim@nmr.ru>
- Re: Null entry in a Graphics list?
  - From: DrBob <drbob@bigfoot.com>
- Re: Null entry in a Graphics list?
  - From: Andrzej Kozlowski <akoz@mimuw.edu.pl>
- Re: Null entry in a Graphics list?
  - From: Yasvir Tesiram <tesiramy@omrf.ouhsc.edu>

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