Re: Null entry in a Graphics list?
- To: mathgroup at smc.vnet.net
- Subject: [mg51823] Re: [mg51795] Null entry in a Graphics list?
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Wed, 3 Nov 2004 01:23:50 -0500 (EST)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
g1 = Graphics[Line[{{0,0},{0,.5}}]];
g2 = Graphics[Line[{{0,0},{1,0}}]];
g3=If[False,Graphics[Line[{{0,0},{1,.5}}]],Graphics[{}]];
Show[g1,g2,g3];
Bob Hanlon
>
> From: AES/newspost <siegman at stanford.edu>
To: mathgroup at smc.vnet.net
> Date: 2004/11/02 Tue AM 02:05:27 EST
> To: mathgroup at smc.vnet.net
> Subject: [mg51823] [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
>
>