MATLAB: How to access data from “Structure within structures”

Question

I am beginner I have structure "Sdata" of struct. Which Contains 10 struct. From these every struct, How can I extract 3rd and 4th value?

Answer 1

If every field has the same size, then this will work:

M = vertcat(Sdata.BoundingBox);
M(:,3:4)

And here is a simple example of it being used. First define some fake data in a 1x3 structure:

>> S(1).B = [8,9,Inf,NaN];
>> S(2).B = [4,5,6,7];
>> S(3).B = [0,1,2,3];

then extract the 3rd and 4th columns of every field:

>> M = vertcat(S.B);
>> M(:,3:4)
ans =
   Inf   NaN
     6     7
     2     3

Read this to know how it works:

http://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html