1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Graph a 2-sphere on graphcalc

  1. Jul 18, 2005 #1
    i attempted to graph a 2-sphere on graphcalc and it wouldn't work. the equations had to be in terms of z, so i had to use: [tex]z=\sqrt{-x^2-y^2+9}[/tex] and [tex]z=-\sqrt{-x^2-y^2+9}[/tex]. i thought that would give me a 2-sphere at the origin with a radius of 3, but it didn't. i got:[PLAIN]http://photobucket.com/albums/a192/YoDizzle/th_almostsphere.bmp.[/URL] [Broken] what did i do wrong?

    the split is along the x y plane. if it matters, this is my first try at using graphcalc.
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Jul 18, 2005 #2
    You got a sphere. It just breaks down near the xy-plane, because the approximations get fuzzy as the slope becomes very large. Your program only evaluates the function value on a small grid of points.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Graph a 2-sphere on graphcalc
  1. Graph of y=x^2 (Replies: 2)

  2. Graphing sqrt(x^2 + 1) (Replies: 12)

Loading...