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MathGroup Archive 2005

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Re: Re: Re: plot hyperbola (OT)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57382] Re: [mg57343] Re: [mg57292] Re: [mg57287] plot hyperbola (OT)
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Thu, 26 May 2005 04:31:26 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200505240912.FAA19094@smc.vnet.net> <200505251002.GAA04053@smc.vnet.net>
  • Reply-to: murray at math.umass.edu
  • Sender: owner-wri-mathgroup at wolfram.com

I received a solution to this annoyance at long last from the Mozilla 
forum (where I had posted months ago and never had a response):  In 
Thunderbird, in Options > Display, uncheck "When displaying plain text 
messages: Display emoticons as graphics".

So somebody on the Mozilla team seems to think ^2 is an emoticon!

Murray Eisenberg wrote:
> 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
>>
>>  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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