Is there a way to predefine constraint size?

[tsofrank]

Hi community,
I am using yalmip in in MATLAB to solve an optimization problem with semi-definite constraints.
I currently define constraints in a for loop by

for i = 1:M
...
constr = [constr; lmiOut(...) <= eps*eye(dimLMI)];
...
end

But my for loop are tens of thousands. Instead of changing the size of constr every time, is there a way I can predefine a list of a certain size and then assign constr(i) in a for loop?
I know MATLAB r2024 has a function createArray, but it requires a "classname" as one of the arguments. If I try

constr = createArray(M,1,"lmi")

or

constr = createArray(M,1,"constraint")

I get an error messages

Default constructor for class 'lmi' does not return a scalar object. /
Default constructor for class 'constraint' does not return a scalar object. Caused by:
Not enough input arguments.

Does anyone have suggestions on how I might be able to predefine a fixed size of constraints?
Many thanks,

Frank

[johanlofberg]

No, SDPs are not vectorizable (and YALMIP is storing stuff in split up lists in various ways to try to avoid some overhead when adding a single constraint to a list of constraints)