I have an array of structs in MATLAB, all of which have the same structure (same fields). I'd like a quick way to compile an array that contains all values of specific field from across the struct array. Is there any way doing this without using loops?

Thanks in advance

• arrays
• matlab
• struct

Suppose your array is named a and you have a field b. Accessing a.b gives you a list of the values of b fields for each element in a. If you want to turn that into a list, just wrap the list in []. That is:

>> a = [struct('a', 1, 'b', 10, 'c', 100), struct('a', 2, 'b', 20, 'c', 200)];
>> a
a = 
1x2 struct array with fields:
    a
    b
    c
>> a.b
ans =
    10
ans =
    20
>> [a.b]
ans =
    10    20
>> [a.c]
ans =
   100   200

If you have a matrix of structs, you can use the above method to get a vector then reshape it into a matrix using:

>> reshape([a.b], size(a))
ans =
    10   111
    20   222