dynamic structure fields in matlab

main.m
% create a structure with some initial fields
my_struct.field1 = 'hello';
my_struct.field2 = 42;

% add a new field called 'field3'
my_struct = setfield(my_struct, 'field3', [1 2 3]);

% display the structure to see the new field
disp(my_struct)

% get the fieldnames of the structure
field_names = fieldnames(my_struct);
disp(field_names)
340 chars
14 lines

main.m
field1: 'hello'
field2: 42
field3: [1 2 3]

{'field1' 'field2' 'field3'}
73 chars
6 lines