I interpret your question to mean that you want copertura{mm,nn}(k,1) to take the value 1 if r0{mm,nn}(k,1) <= r0_max(mm,nn), and 0 otherwise. If so, this should do the trick:
copertura = cell(mm_max,nn_max);
for mm = 1:mm_max
for nn = 1:nn_max
copertura{mm,nn}=double(r0{mm,nn}(:,1) <= r0_max(mm,nn));
end
end
