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MathGroup Archive 2005

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Re: Re: plot hyperbola (OT)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57343] Re: [mg57292] Re: [mg57287] plot hyperbola (OT)
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Wed, 25 May 2005 06:02:50 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200505240912.FAA19094@smc.vnet.net>
  • Reply-to: murray at math.umass.edu
  • Sender: owner-wri-mathgroup at wolfram.com

This is a bit off-topic, but it's been an annoyance for a while now....

I've been having difficulty copying code such as that below from my
e-mail client into Mathematica: The e-mail client, Thunderbird, displays
expressions such as "x^2" in a 2-dimensional form, with a superscript
(and no caret); when I copy from there and paste into Mathematica, of
course I get just "x2" -- no superscript and no caret.

I do have my e-mail client set so as not to display HTML as such.

Any ideas?

David Park wrote:
> You could use the ImplicitPlot routine. First you have to load the
> Graphics`ImplicitPlot` package that is in the StandardPackages.
> 
> Needs["Graphics`ImplicitPlot`"]
> 
> ImplicitPlot[
>   x^2 + 3 x^2 y^3 + 67 x^4 y^2 + 34 == 0, {x, -50, 50}, {y, -30000, 0},
>   AspectRatio -> 1]
> 
> That is a difficult curve and I had to 'fish' around to find it. I also
> changed the AspectRatio of the plot to 1 to avoid getting very high and very
> narrow plots that went off screen. There may be other branches of the curve.
> 
> You can plot quadratic equations the same way and they will be easier.
> 
> For quadratic equations you may want to look at the ConicSections package at
> my web site below. It will generate a parametrization for any conic section
> which you can use to plot with ParametricPlot. It also will give the type of
> conic, its parameters and how to transform it to standard form.
> 
> David Park
> djmp at earthlink.net
> http://home.earthlink.net/~djmp/
> 
> 
> From: bd satish [mailto:bdsatish at gmail.com]
To: mathgroup at smc.vnet.net
> To: mathgroup at smc.vnet.net
> 
> 
> 
>   HI, i am a beginner. Will u please tell me how to plot
> hyperbola,parabola,ellipse and circle in their standard forms
>    x^2/a^2 + y^2/b^2 = 1
>   x^2/a^2 -- y^2/b^2 ==1 etc.
>  Also how do you plot a general curve (y versus x), say
>     x^2 +3 x^2 y^3 +67 x^4 y^2 +34==0
>  *without solving explicitly for y* ( or x)
>   Please help
> 
> 
> 
> 
> 
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305



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