Re: Supressing Plot Output
- To: mathgroup at smc.vnet.net
- Subject: [mg16435] Re: Supressing Plot Output
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Sat, 13 Mar 1999 02:21:46 -0500
- References: <7c59gj$7n3@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Benjamin Rahn wrote in message <7c59gj$7n3 at smc.vnet.net>... >How can I overlay plots and graphics primitives _without_ displaying the >individual plots first? > >For example, I have a function that creates a plot of a spiral based >on three points in the plane: > >Spiral[A_,B_,C_]:=Module[ ... > ...; > ParametricPlot[...] ]; > >The function Spiral[] immediately generates the spiral, so the >command > >Show[Spiral[P,Q,R],Graphics[Line[{P,Q,R,P}]]]; > >gives two outputs: an image of the spiral by itself, and an image of the >spiral with the overlaid triangle. How can I restrict the output to the >second image? > >Thanks! > >-Ben > > Ben: Two general ways 1) Using the option DisplayFunction -> Identity with Plot Spiral[A_,B_,C_]:=Module[ ... ...; ParametricPlot[...,DisplayFunction -> Identity ] ]; Then turn the display back on with Show: Show[Spiral[P,Q,R],Graphics[Line[{P,Q,R,P}]],DisplayFunction -> $DisplayFunction]; 2) *Temporarily* cancel display using Block Spiral[A_,B_,C_]:=Module[ ... ...; Block[{ $DisplayFunction =Identity},ParametricPlot[... ] ] ]; Then simply use show Show[Spiral[P,Q,R],Graphics[Line[{P,Q,R,P}]]]; --------------------- Allan Hayes Mathematica Training and Consulting Leicester UK www.haystack.demon.co.uk hay at haystack.demon.co.uk Voice: +44 (0)116 271 4198 Fax: +44 (0)870 164 0565