T and Vt can be of arbitrary size and dimensions, as long as both T and Vt have the same size and dimensions.
ind = Rt >= 0;
Rt(ind) = T(ind) - Vt(ind);
You can put that into an infinite loop
dont_stop = 1;
while dont_stop
% copy above code here
end
that can be stopped typing CRTL-C. But usually you want to define a stop criterium inside the loop.
