A=eye(3) B. A=eye(3,1) C. A=eye(1,3) D. A=eyes(1,3)
A= fix(200*rand(5,6)) B. A= fix(201*rand(5,6)) C. A=fix(100+100*rand(5,6)) D. A=fix(100+101*rand(5,6))
A. 1+0.2+randn(500) B. 1+sqrt(0.2)*randn(500) C. 1+0.2+randn(25,20) D. 1+sqrt(0.2)*randn(25,20)