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matlabstructureremoveall

Removing items from a structure array in matlab

I have a very large structure array in matlab. Suppose, for argument's sake, to simplify the situation, I have something like:

structure(1).name = 'a';
structure(2).name = 'b';
structure(3).name = 'c';
structure(1).returns = 1;
structure(2).returns = 2;
structure(3).returns = 3;

Now suppose I have some condition that comes along and makes me want to delete everything from structure(2) (any and all entries in my structure array). What is a good way to do that?

My solution has been to just set the corresponding fields to [] (e.g. structure(1).name = [];), but that doesn't remove them, that only makes them empty. How do I actually remove them completely from the structure array? Is there a way?

Solution

  • simple if you want to delete element at index i do the following:

    i = 3
structure(i) = [];

    And that will remove element at index 3.

    Example:

    st.name = 'text';
st.id = 1524;
arrayOfSt = [st st st st st];

    Now:

    arrayOfSt = 

    1x5 struct array with fields:
        name
        id

    If we execute:

    arrayOfSt(2) = [];

    then the new value of the array of structers will be:

    arrayOfSt = 

    1x4 struct array with fields:
        name
        id

    Try it !