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Matlab graphing/plotting problem

  1. Mar 13, 2008 #1
    1. The problem statement, all variables and given/known data

    i have 4 points,
    (8,0)
    (4,-4)
    (-4,4)
    (-8,0)
    i want to draw a graph of this on matlab so that the first to points are joined, the last two points are joined, but i want it on the same graph.
    how do i do this? what's the command?
    thank you
     
  2. jcsd
  3. Mar 13, 2008 #2
    Alright, so you're learning to use Matlab... :)
    Your first two coordinates are: (8,0) and (4,-4)
    These coordinates are in the form (X,Y).
    so make an array with your X data and an array with your Y data like this:
    X1=[8 4]; Y1=[0 -4];
    Then get Matlab to plot it by using the plot command:
    plot(X1,Y1)

    Do the same for the other pair of coordinates...

    Altogether, it will look like this: (just cut and paste.. and it should work)

    %start
    X1=[8 4]; Y1=[0 -4];
    X2=[-4 -8]; Y2=[4 0];

    plot(X1,Y1,...
    X2,Y2);
    %end
     
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