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Using polyfit() on arrays?

  1. Jul 11, 2011 #1
    I have 2 arrays:

    Code (Text):

    vxb =
        0.0001    0.0001    0.0001    0.0002    0.0002
        0.0003    0.0003    0.0003    0.0003    0.0003
        0.0003    0.0004    0.0005    0.0005    0.0005
        0.0005    0.0006    0.0006    0.0006    0.0006
        0.0006    0.0006    0.0007    0.0007    0.0007
    .
    .
    .

     
    and
    Code (Text):

    vtime =
        0.2570    0.4500    0.6420    0.8350    1.0280
        1.2210    1.4130    1.6060    1.7990    1.9920
        2.1840    2.3770    2.5700    2.7630    2.9550
        3.1480    3.3410    3.5340    3.7260    3.9190
        4.1120    4.3050    4.4970    4.6900    4.8830

    .
    .
    .
     
    I would like to use polyfit to return an array p(,i,j) in which each row of p is the polyfit of
    p(i,:) = polyfit(vxb(i,:), vtime(i,:), 4).

    I know that I can do it with a loop, but I figured MATLAB is smart and there is a syntax I could use to do this.
     
  2. jcsd
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