matlab - Preallocating a structure with variables of different names, size and type -

i going use algorithm in for loop iteration loop. know of calculations can done once , results can used necessary inputs algorithm in for loop in way there no need calculate same things in each iteration. so, calculate them once , put them in structure.

i use structure since have many variables kept used in for loop , name , size different. put them in structure same name example:

out.a = a; out.myvector = myvector;  out.s = s;  out.hx_l = hx_l;  

and on. of them matrices, of them cubes or variables forth dimension , of them cells.

is there way preallocate kind of structure?

you initialise structure following way:

out = struct('a',[],'myvector',[],'s',[],'hx',[]); 

when assign variables afterwards, structure fields created. contents not initialised upfront. quoting loren:

how important initialize contents of struct. of course depends on specifics, since each field own matlab array, there not need initialize them front. key try not grow either struct or of contents incrementally.