>> A=rand(3,4)A = 0.8147 0.9134 0.2785 0.9649 0.9058 0.6324 0.5469 0.1576 0.1270 0.0975 0.9575 0.9706>> B=A(2,:)B = 0.9058 0.6324 0.5469 0.1576>> C=A(:,3)C = 0.2785 0.5469 0.9575