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Small Help in MatLap ( square matrix ? )

  1. Dec 22, 2009 #1
    Small Help in MatLap ( square matrix ?!? )

    how can i solve this problem

    as iam a beginner in the matlap :)


    the main question is

    plot the following discrete functions

    1- x[n]=0.7^n*u[n] -5<n<17

    plz help me thanks in advance
     
  2. jcsd
  3. Dec 22, 2009 #2
    Re: Small Help in MatLap ( square matrix ?!? )

    plz help i need it urgently :)
     
  4. Dec 23, 2009 #3

    Mark44

    Staff: Mentor

    Re: Small Help in MatLap ( square matrix ?!? )

    I'm pretty sure you mean matlab.
    Your variable n is an array, so you need to use the element-by-element power operator, which is .^

    Also, you are setting u to 1 in the second line, above, but u appears to be an array in the third line. You're going to run into another problem with u(n), since the index of an array has to be an integer >= 1. IOW, the value of n must be an integer >= 1 in an expression u(n).

    Here's a link to some documentation on MATLAB. I have found it to be pretty helpful.
    http://www.mathworks.com/access/helpdesk/help/pdf_doc/matlab/getstart.pdf
     
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