Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Help with analysing graph

  1. Sep 7, 2012 #1
    Hi, im new to this forum as i relly need help with this maths question - can anyone help?
     

    Attached Files:

  2. jcsd
  3. Sep 7, 2012 #2

    chiro

    User Avatar
    Science Advisor

    Hey spacecadeta and welcome to the forums.

    You need to show what you have done and tried, what you are thinking (i.e. your thought process) and specifically where you are having trouble.

    If you need to graph something, a good package is R:

    http://www.r-project.org/

    If you have been recommended to use something else from your teacher (since this is clearly a homework/assignment problem) then use that.

    We do the above because you don't learn if you just get all the answers: if your question was more specific, then things might be different but they aren't.
     
  4. Sep 7, 2012 #3
    Thanks Chiro,
    What im having the problem with is how to find the model to fit the data points, i can graph the data but the model is where im getting lost...
     
  5. Sep 7, 2012 #4

    chiro

    User Avatar
    Science Advisor

    Well in general, finding fitting models is a pretty ugly thing.

    What kinds of things can you think of that the model "looks like"? Sine or cosine curve? Exponential? Square or Cube?

    If you show us your ideas (and the graph you generated as an attachment), you might get more specific suggestions.
     
  6. Sep 7, 2012 #5
    Even a series of connected straight line graphs could do as a model here. The idea is to pick a model and discuss where it fits the data and doesn't. Even if the model isn't a good fit, you will get high marks if your discussion of the model strengths and faults is good. For instance, three or four straight lines connected together could be caused by a trend of increasing yields that decreased as a result of an unknown event and such cycle repeats.
     
    Last edited: Sep 7, 2012
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Help with analysing graph
  1. Question on Graph (Replies: 1)

  2. Coloring graphs (Replies: 1)

  3. Groups and graphs (Replies: 1)

  4. Graph theory (Replies: 1)

  5. Graphing a plane (Replies: 2)

Loading...