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Cool 3-D functions for graphing

  1. Oct 26, 2006 #1
    I am collecting nice 3-d functions to demonstrate graphing tool, if any one have great functions which will look great on 3-d plotting, please let me know.

    Here are few equations I am using now. If you guys need I can provide a link to plot each of these graphs.

    (01) x*y^3-y*x^3
    (02) (x^2+3*y^2)*e^(-x^2-y^2)
    (03) -x*y*e^(-x^2-y^2)
    (04) -1/(x^2+y^2)
    (05) cos(abs(x)+abs(y))
    (06) cos(abs(x)+abs(y))*(abs(x)+abs(y))

    Note:
    I have discuss some 2-D functions for my earlier tool, which you can see on this thread
    Cool 2-D functions for graphing

    Thanks in advance
     
  2. jcsd
  3. Oct 26, 2006 #2

    Office_Shredder

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    You can probably find cooler functions if they're implicitly defined. Can your graphing tool handle those?
     
  4. Oct 26, 2006 #3
    I am not sure what you looking for, here is one sample 3D graph drawn from the tool
    Graph: cos(abs(x)+abs(y))*(abs(x)+abs(y))
     
  5. Oct 26, 2006 #4

    robphy

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  6. Oct 26, 2006 #5
  7. Oct 27, 2006 #6
    There was a bug, when some one put a function with spaces in middle, forums bbcode url not working, this is fixed now.
     
  8. Oct 27, 2006 #7

    radou

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    How come Arildno didn't suggest to plot f(x, y) = 0 yet.. :cool:
     
  9. Oct 27, 2006 #8

    arildno

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    Dearly Missed

    He is a lost case, so I resigned from trying to make him appreciate the beauty of the Great Annihilator.

    I'll be back if he tries to top f(x,y,z)=0 in 4-D, though.:smile:
     
  10. Oct 27, 2006 #9

    Office_Shredder

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    I mean, for example, if I said to graph cos(z) + sin(xy - 2) = 0, could it graph that for z as a function of x and y?
     
  11. Oct 28, 2006 #10
    Sorry you cannot graph this function

    cos(z) + sin(xy - 2) = 0

    function must be in this format

    f(x,y)

    where

    f(x,y) = z
     
  12. Oct 28, 2006 #11

    Office_Shredder

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    1/(sin(abs(x)+x)-cos(abs(y)+y))
     
    Last edited: Oct 28, 2006
  13. Oct 28, 2006 #12

    Office_Shredder

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    floor(e^(abs(x*y/2))+round(1/cos(x*y))) works out just as well, and doesn't look nearly so ugly from a function point of view :rofl:
     
  14. Oct 29, 2006 #13
    Last edited: Oct 29, 2006
  15. Oct 29, 2006 #14

    robphy

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    When I came up with my first function above, I was goofing around with various functional forms. When I came upon something I liked, I used it and didn't reduce it to a visually-similar but functionally-simpler form.
     
  16. Oct 29, 2006 #15

    Office_Shredder

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    I actually wasn't specifically trying to reduce your function, I just happened to stumble upon it (before looking at yours actually) :biggrin:
     
  17. Oct 29, 2006 #16

    robphy

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  18. Oct 29, 2006 #17

    Office_Shredder

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    Did you change the program or something? Because 1/(sin(abs(x)+x)-cos(abs(y)+y)) is coming out differently now than it was before (specifically, part of it doesn't even show up)
     
  19. Oct 30, 2006 #18
    Didn’t do any changes to the program, did you try adjusting the Z-Axis boundary limit.

    Try and see whether its work for you, if you are not sure the range you can set it to

    z-min = Auto
    Z-max = Auto
     
  20. Mar 25, 2011 #19
    Actually you can graph this...I tried it in grapher on my mac and it worked like a charm...
     
  21. Mar 25, 2011 #20
    [QUOTE:biggrin:]Actually you can graph this because grapher works with it...
     
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