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Math Help - Matricies Help

  1. #1
    Senior Member sakonpure6's Avatar
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    Matricies Help

    I just started learning about Matrices as part of of self study unit.
    Did I do a) and b) correctly? and can someone help me with c) I do not understand what to do, is Bart represented by b, Casey by c ??? what subscripts do I use to represent the matrix described?
    Matricies Help-matrix-1-.jpg
    Matricies Help-matrix-2-.jpg
    Matricies Help-matrix-3-.jpg
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  2. #2
    MHF Contributor
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    Re: Matricies Help

    a and b are correct

    In this matrix the intersection of person A and person B the value is 1 if they share a class, 0 otherwise. The matrix is nothing but 1's and 0's.

    Just represent it as they've shown
    Amy = 1
    Bart = 2
    Casey = 3
    Djamshid = 4

    so element (2,3) represents whether Bart and Casey share a class.
    Last edited by romsek; March 21st 2014 at 04:12 PM.
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  3. #3
    Senior Member sakonpure6's Avatar
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    Re: Matricies Help

    so for the element (2,3) I am going t refer to it as: a23 (that's how I read online to name elements) but where would the 1 or the 0 go to indicate that the students are in the same class??
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    Re: Matricies Help

    Quote Originally Posted by sakonpure6 View Post
    so for the element (2,3) I am going t refer to it as: a23 (that's how I read online to name elements) but where would the 1 or the 0 go to indicate that the students are in the same class??
    $a_{23}=1$ or $a_{23}=0$ works. Or you could just draw a matrix and fill it out. They've already drawn it for you on that sheet. Just put the 1's and 0's where they belong.
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  5. #5
    Senior Member sakonpure6's Avatar
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    Re: Matricies Help

    Oh I get it, I thought I had to write the element position in the matrix >.<
    Attached Thumbnails Attached Thumbnails Matricies Help-matrix.jpg   Matricies Help-matrix.jpg  
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