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Help with MatLab

  • 07-11-2006 5:18pm
    #1
    kevmy
    Closed Accounts Posts: 2,178 ✭✭✭


    Hey eveybody
    I'm new to Matlab but will be using it alot from now on. Unfortunately I've come up against a problem pretty quickly. I'm trying to calculate the gradient of a matrix but all I get is:

    ??? Attempt to execute SCRIPT gradient as a function.

    Now I've tried copying the example of the use of the gradient function from Help directly into the .m* file but this results in the same message.

    Here is what the relevant piece of code from the .m* file looks like so far:

    x = -1:0.4:1
    y = -1:0.4:1

    [X,Y] = meshgrid(x,y)

    Q = atan2(Y,X)
    mesh (Q)

    [pQ] = gradient(Q)

    It will put the marix into the mesh figure as wanted but will not do anything with the gradient. I think the answer should come out as a vector but I'm not sure.
    Any help will be greatly appreciated.


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