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

**References**:**Re: plot hyperbola***From:*"David Park" <djmp@earthlink.net>

**Re: Re: plot hyperbola (OT)***From:*Murray Eisenberg <murray@math.umass.edu>