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Finding an oscillator's period with a dataset in Mathematica

  1. Jan 15, 2009 #1
    1. The problem statement, all variables and given/known data
    I have a dataset of an oscillator with 51 measurements, I uploaded it here. It's in the form of {time, position}. I have to find the period of this oscillator in Mathematica.

    2. Relevant equations
    I have to use the NonLinearRegress function to find it.


    3. The attempt at a solution
    I started with the following code:
    Code (Text):
    data = {oscdata};
    {tdata, xdata} = Transpose[data]
    1. The problem statement, all variables and given/known data
    That gives me the first problem, because I get an error saying the two lists are not the same shape, while they clearly are. Anyone know why that's happening?

    Code (Text):
    "Lists {tdata,xdata} and \
    {{{0,0.369}},{{0.1,0.0999}},{{0.2,0.0904}},{{0.3,-0.054}},{{0.4,-0.1}}\
    ,{{0.5,-<<6>>}},{{0.6,-0.328}},{{0.7,-0.388}},{{0.8,-0.486}},{{0.9,-0.\
    576}},<<51>>} are not the same shape"
     
  2. jcsd
  3. Jan 16, 2009 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    That's strange, it worked perfectly here

    Code (Text):
    data = Import["http://home.orange.nl/~kuip3148/osc.dat"]
    {tdata, xdata} = Transpose[data]
     
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