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Find area under curve and energy of function (matlab)

  1. Feb 13, 2014 #1
    1. The problem statement, all variables and given/known data
    image.png

    For the 1st one you wouldn't really need matlab I guess to find the area under the curve, it is 0 and so is its energy. For the 2nd one I got A=1.73 and so E=2.99.


    2. Relevant equations
    area under curve = evaluate integral from t=t1 to t=t2. in this case t=-2 to t=5 since they are both defined only that far.

    energy = area2


    3. The attempt at a solution
    Used matlab and the waveforms for the functions are plotted below. I used trapz() to approximate the integral i.e. to find the area. I could post the matlab code but wouldn't think it would be of much use.

    image2.png
     
  2. jcsd
  3. Feb 14, 2014 #2

    tiny-tim

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    hi asdf12312! :smile:

    (what are you asking about?)

    for the 2nd one, can't you integrate e-t ?
     
  4. Feb 14, 2014 #3
    I guess you could lol. Integrating e^-t from t=0 to t=2 and e^(t-4) from t=2 to t=4. so u would get the answer i had listed.. i dont realy know what my question was :(
     
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