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Math Help - Storage vectors

  1. #1
    Newbie sir nerdalot's Avatar
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    Storage vectors

    hello all!!



    i've been given a few questions on storage vectors as homework and given this statement as a description of them...
    Row and column matrices often arise in applications, and commonly have particular meanings and properties that do not apply to matrices in general. For this reason, we defind them separately as vectors and consider their properties and operations as separate to matrices
    • A storage vector is a column or row matrix that stores information
    • The dimension of a storage vector is the number of elements of the column or row matrix
    Question 1...
    A school tuckshop has a lunch order system for items requiring preparation. If you want sandwiches or filled rolls they must be ordered in advance. There is a choice of salad, ham, ham and cheese, or ham and salad fillings.
    Set up a 'n'-dimensional storage vector for a class of 30 year 7 students and their 2 teachers. You can decide what they order for lunch given that at least half place a lunch order on a given day.
    So can someone please help explain what a storage vector is and walk me through the question above!!

    thanks
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  2. #2
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    earboth's Avatar
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    Quote Originally Posted by sir nerdalot View Post
    hello all!!



    i've been given a few questions on storage vectors as homework and given this statement as a description of them...
    Row and column matrices often arise in applications, and commonly have particular meanings and properties that do not apply to matrices in general. For this reason, we defind them separately as vectors and consider their properties and operations as separate to matrices
    • A storage vector is a column or row matrix that stores information
    • The dimension of a storage vector is the number of elements of the column or row matrix
    Question 1...
    A school tuckshop has a lunch order system for items requiring preparation. If you want sandwiches or filled rolls they must be ordered in advance. There is a choice of salad, ham, ham and cheese, or ham and salad fillings.
    Set up a 'n'-dimensional storage vector for a class of 30 year 7 students and their 2 teachers. You can decide what they order for lunch given that at least half place a lunch order on a given day.
    So can someone please help explain what a storage vector is and walk me through the question above!!

    thanks
    Hello,

    I only came across vector storage at image compression .. but why not compress a sandwich with salad

    Numerate the different ingredients:
    salad = 1
    ham = 2
    ham+cheese = 3
    ham+salad = 4

    Then the vector O (for order) contains the orders of n users:

    O = \underbrace{[1, 3, 3, 4, 2, 2, 2, 1, ..., 4]}_{\text{n components}}
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