Indexing multiple values of an array of structures with a field that varies in length

I have an array of structures, A. Each structure has a field 'vec'. Each 'vec' is a vector, but the length of the vector can vary with the index into A. So

length( A(i).vec ) = n
length( A(j).vec ) = m

I want to grab the last number of each of these vectors and place them in an array. The idea is something like

x = A(:).vec(end);

but of course that doesn't work.

Answer 1

[Geoff Hayes]

John - why not use arrayfun to grab the last element of each structure in your array A. Something like

 lastElements = arrayfun(@(x)x.vec(end),A);

This seems to work for the following example

 % randomly choose the lengths of 100 vectors
 vecLengths = randi(42,100,1);

 % create A
 A = [];
 for k=1:length(vecLengths)
       A(k).vec = randi(255,1,vecLengths(k));
 end

 % get the last element from each vector
 lastElements = arrayfun(@(x)x.vec(end),A);