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Math Help - matrics in matlab

  1. #1
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    Question matrics in matlab

    i have the following sequence in matlab:
    n=100;
    d=ones(n,1);
    A=diag(d,1)+diag(d,-1);
    e=eig(A);
    plot(-n/2:n/2,e,'.')


    It gives me this figure that i have attached.

    I need to find a formula for the own values of this matix and i don't know how.
    Attached Thumbnails Attached Thumbnails matrics in matlab-figura.jpg  
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  2. #2
    Senior Member
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    Your question doesn't make sense to me. In particular "the own values of this matix" is not good English.

    I stand corrected
    Last edited by superdude; January 26th 2010 at 02:51 PM.
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by superdude View Post
    Your question doesn't make sense to me. In particular "the own values of this matix" is not good English.
    He is asking for an explicit formula for the eigen values of NxN matrices with zeros everwhere except for the diagonals above and below the principle diagonal where all the elements are 1.

    Which of course is not a Matlab question but is a linear algebra question, so I suppose I ought to move this thread.

    CB
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