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Matlab beginner, making variables

  1. Mar 13, 2009 #1
    in matlab how do i make a variable which is dependant on another variable, for example

    y=2*a+3 for any a,
    so that when i change a, y will automatically change

    i have only managed to set a value for a, then set y and i get a fixed value for y
     
  2. jcsd
  3. Mar 13, 2009 #2
    Right, and you can place whatever value or values in 'a' that you like. For instance, if 'a' is a vector containing 7 different values, and the formula is written correctly, then 'y' will contain 7 values, each that function of the corresponding element in 'a':

    >> a = [-1 0 1 2 3 4 5]

    a =

    -1 0 1 2 3 4 5

    >> y = 2 * a + 3

    y =

    1 3 5 7 9 11 13



    -Will Dwinnell
    http://matlabdatamining.blogspot.com/" [Broken]
     
    Last edited by a moderator: May 4, 2017
  4. Mar 13, 2009 #3
    Sounds like you're looking for functions. If you're function is simple, you can use an anonymous function (no separate m-file required) or you can use a separate m-file function with a function handle.

    Check out the Mathworks site and search for 'Anonymous Functions' or 'Function Handles' (or search within MATLAB's help).

    Is this what you're looking for?

    -Kerry
     
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