Re: Question re: graphics primitives
- To: mathgroup at smc.vnet.net
- Subject: [mg77653] Re: [mg77593] Question re: graphics primitives
- From: Carl Woll <carlw at wolfram.com>
- Date: Thu, 14 Jun 2007 05:34:04 -0400 (EDT)
- References: <200706131140.HAA07131@smc.vnet.net>
Ghuloum, Anwar wrote: >Is it possible to put conditional clauses (i.e. If[.]) in the >VertexRenderingFunction option for TreeForm (or any primitive that this >option applies to)? I wanted to selectively label vertices based on label >content, but Mathematica was complaining that "If" is not a graphics >primitive or directive. > > > >(Basically, I'm trying to draw a tree where only the leaves have labels: > >TreeForm[{{a, b}, {c, {d}}}, VertexRenderingFunction -> (If[#2 == List, {}, >Text[#2, #1]] &)] > >) > > Try using === instead of ==: TreeForm[{{a, b}, {c, {d}}}, VertexRenderingFunction -> (If[#2 === List, {}, Text[#2, #1]] &)] Alternatively, use the 4 argument form of If. Your problem was that If couldn't determine whether a==List was True or False. Hence it was left unevaluated, and the result wasn't a graphics directive. Carl Woll Wolfram Research > > >In general, I was having a hard time finding information at the >documentation center on the limitations on how I can generate graphics >primitives.but perhaps I'm not looking in the right place. > > >Thanks in advance! > >-- > >Anwar Ghuloum > >Microprocessor Technology Lab, Intel > > > >
- References:
- Question re: graphics primitives
- From: "Ghuloum, Anwar" <anwar.ghuloum@intel.com>
- Question re: graphics primitives