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MathGroup Archive 2005

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Re: Plotting 2d graphs?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57174] Re: [mg57168] Plotting 2d graphs?
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Fri, 20 May 2005 04:43:07 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

Needs["Graphics`"];

soln=Solve[2x^2+16x+32==0,x]

{{x\[Rule]-4},{x\[Rule]-4}}

Plot[2x^2+16x+32,{x,-5,-3}];

ImplicitPlot[2x^2+16x+32==y,
    {x,-5,-3},AspectRatio->1/GoldenRatio];

Plot[Evaluate[y/.
        Solve[(x-5)^2/16+(y+4)^2/25==1,y]],
    {x,1,9}, AspectRatio->Automatic];

ImplicitPlot[(x-5)^2/16+(y+4)^2/25==1,
    {x,1,9}];


Bob Hanlon

> 
> From: Paul Hughes <psidoc at gmail.com>
To: mathgroup at smc.vnet.net
> Date: 2005/05/19 Thu AM 03:09:21 EDT
> Subject: [mg57174] [mg57168] Plotting 2d graphs?
> 
> I'm having trouble using the basic 2d plot function.  I want to be
> able to plot things such as a simple quadratic or ellipse:
> 
> Examples:  2x^2 + 16x + 32 = 0  (Quadratic)
> 
> (x-5)^2/16 + (y+4)^2/25 = 1  (Ellipse)
> 
> But have failed to do so, having tried every variation i can think of
> to get it to work.
> 
> 


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