You can call subfunctions only from their main function. This impedes a unit-testing. But the main function can provide a function handle to the subfunction:
subFcnH = YourFcn('giveMeHandles');
subFcnH(0.1) - sin(0.1) % A simply unit-testing
function out = YourFcn(in)
% If input is a CHAR or string and equals a keyword:
if strcmpi(in, 'giveMeHandles')
out = @subFcn;
return;
end
% The actual calculation:
out = subFcn(in);
end
function y = subFcn(x)
y = sin(x);
end
