Hi @Augustine
In the past, the convention was to save the helper function as a standalone m-file, typically placed in the same folder as the Main Program (script) file. However, starting from R2016b, it is possible to place the helper function inside a script. In this case, the helper function should be positioned at the end of the file, after the script code.
%% Main Program (script)
...
...
...
% end of script
%% Local function
function y = helper(x)
...
end
If the Main Program is implemented as another function file, then the helper function can be placed using the nested approach.
function main
...
...
...
function y = helper(x)
...
end
end
