Re: Plotting 2d graphs?

*To*: mathgroup at smc.vnet.net*Subject*: [mg57196] Re: Plotting 2d graphs?*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Fri, 20 May 2005 04:43:41 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 5/19/05 at 3:09 AM, psidoc at gmail.com (Paul Hughes) wrote: >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. For your first example, try Plot[2*x^2 + 16*x + 32, {x, -10, 2}]; Here, the arguements to plot are the function (2*x^2 + 16*x + 32) to be plotted and a list giving the independent variable and the range to sample it. For your second example, try <<Graphics` ImplicitPlot[(x - 5)^2/16 + (y + 4)^2/25 == 1, {x, 0, 10}, {y, -10, 4}, AspectRatio -> 1]; Here the arguments are the equation, (x - 5)^2/16 + (y + 4)^2/25 == 1 (note the usage of "==" instead of "=") and two list giving the variables and ranges for sampling each variable. I also changed the default aspect ratio so the resulting plot would be a truer representation of this ellipse. -- To reply via email subtract one hundred and four