Shop OBEX P1 Docs P2 Docs Learn Events
Plotting 3d Sperical curve — Parallax Forums

Plotting 3d Sperical curve

ajit.nayak87ajit.nayak87 Posts: 76
edited 2014-03-31 07:15 in General Discussion
nrel25mar.xls

I wanted to plot graph For time vs zenith,azimth and elevation in spehrical coorinate system. Let me know is there any way to plot above graph. I have attached excel sheet for reference also links of graph

(http://en.wikipedia.org/wiki/Horizon...rdinate_system http://en.wikipedia.org/wiki/Spheric...rdinate_system),
xls
xls
nrel25mar.xls
194K

Comments

  • Kevin WoodKevin Wood Posts: 1,266
    edited 2014-03-28 07:19
    You'll probably need to use a program like Matlab or one of its' clones (Octave, Scilab), or a math app like Mathematica or Maple, or maybe a python distro targeted towards data analysis... Anaconda and Enthought would likely work.
  • ellipserellipser Posts: 43
    edited 2014-03-29 19:16
    Can you say a little more about it? It's like you're trying to plot a sunrise/sunset on spherical coordinates, or something like that, right? And then trying to determine where to point some solar cells.

    From what I understand, Zenith should always be directly overhead, and so shouldn't change. Of course the azimuth and elevation will change during the day.
  • ajit.nayak87ajit.nayak87 Posts: 76
    edited 2014-03-30 21:27
    ellipser wrote: »
    Can you say a little more about it? It's like you're trying to plot a sunrise/sunset on spherical coordinates, or something like that, right? And then trying to determine where to point some solar cells.

    From what I understand, Zenith should always be directly overhead, and so shouldn't change. Of course the azimuth and elevation will change during the day.


    I have zenith ,azimuth, elvation angle. Plot like http://astro.unl.edu/classaction/animations/coordsmotion/altazimuth.html as in link
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2014-03-31 03:20
    Do you want it to be animated in order to demonstrate the transit of the sun over a day, a week, or a month with changes in sun angle and such?
  • ajit.nayak87ajit.nayak87 Posts: 76
    edited 2014-03-31 03:26
    I dont want to be animated,I have Zenith , azimuth and elevation angle. I wanted to represent as in link. for particular day of time
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2014-03-31 03:51
    Maybe you can copy the .html at the link you provided and have exactly the same thing.

    What you really require is an interactive graphic program that will draw circles and arcs. I have no idea what is available. sorry.
  • Mike GMike G Posts: 2,702
    edited 2014-03-31 05:21
    Did you happen to read the instructions at the bottom of the page linked in post #4?
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2014-03-31 07:15
    I presume that is being asked of me.

    Graphically, I am trying to figure out if the OP desires a 2D representation of a 3D sphere.

    The actual graphics is quite simple as a sphere is represented at a circle in 2D, and any slice of the great circle is an ellipse imposed on the the circle.

    It seems to be a matter of mainly finding a way to interpolate the shape of the ellipse and a point on the ellipse.

    But there seems to be a language barrier that makes a muddle of knowing how this is going to be presented. Does he want a graphic to insert into text? Does he want a piece of software for his own computer to represent solutions as required? Or does he want to create this to be used in an .html for public use?

    I can only guess. The maths for ellipses would resolve 90% of his problems in he wants a 2D representation of a sphere.
Sign In or Register to comment.